Rock types

• Carboniferous limestone
  Carboniferous limestone
  Carboniferous Limestone is a term used to describe a variety of different types of limestone occurring widely across Great Britain and Ireland which were deposited during the Dinantian epoch of the Carboniferous period. They were formed between 363 and 325 million years ago...
  
  
• Coquina
  Coquina
  Coquina is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically sorted fragments of the shells of either molluscs, trilobites, brachiopods, or other invertebrates. For a sediment to be considered to be a coquina, the average size of the...
  
  
• Coral rag
  Coral rag
  Coral rag is a rubbly limestone composed of ancient coral reef material. The term also refers to the building blocks quarried from these strata which are an important local building material in areas such as the east African coast and the Caribbean basin .It is also the name of a member — the Coral...
  
  
• Coral sand
  Coral sand
  Coral sand is sand of particles originating in tropical and sub-tropical marine environments from bioerosion of limestone skeletal material of marine organisms. One example of this process is that of parrot fishes which bite off pieces of coral, digest the living tissue, and excrete the inorganic...
  
  
• Diatomaceous earth
  Diatomaceous earth
  Diatomaceous earth also known as diatomite or kieselgur/kieselguhr, is a naturally occurring, soft, siliceous sedimentary rock that is easily crumbled into a fine white to off-white powder. It has a particle size ranging from less than 1 micrometre to more than 1 millimetre, but typically 10 to...
  
  
• Fossil beach
  Fossil beach
  A fossil beach is an ancient beach which is preserved in fossil form due to a change in sea level or a shift in elevation which causes the beach to become an elevated terrace....
  
  
• Lagerstätte
  Lagerstätte
  A Lagerstätte is a sedimentary deposit that exhibits extraordinary fossil richness or completeness.Palaeontologists distinguish two kinds....
  
  
• Lithographic Limestone
  Lithographic Limestone
  Lithographic limestone is hard limestone that is sufficiently fine-grained, homogeneous and defect free to be used for lithography. Geologists use the term lithographic texture to refer to a grain size under 1/250 mm...
  
  
• Keystone
• Marl
  Marl
  Marl or marlstone is a calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and aragonite. Marl was originally an old term loosely applied to a variety of materials, most of which occur as loose, earthy deposits consisting chiefly of an intimate mixture of clay...
  
  
• Millstone
  Millstone
  Millstones or mill stones are used in windmills and watermills, including tide mills, for grinding wheat or other grains.The type of stone most suitable for making millstones is a siliceous rock called burrstone , an open-textured, porous but tough, fine-grained sandstone, or a silicified,...
  
  
• Plattenkalk
  Plattenkalk
  Plattenkalk is a very finely grained limestone chemically precipitated in a stratified water column under conditions where bioturbation does not occur...
  
  
• Shelly limestone
  Shelly limestone
  Shelly limestone is a highly fossiliferous limestone, composed of a number of fossilized organisms such as brachiopods, bryozoans, crinoids, sponges, corals and mollusks. It varies in color, texture and hardness...
  
  
• Stylolite
• Trace fossil
  Trace fossil
  Trace fossils, also called ichnofossils , are geological records of biological activity. Trace fossils may be impressions made on the substrate by an organism: for example, burrows, borings , urolites , footprints and feeding marks, and root cavities...
  
  
• Tuff
  Tuff
  Tuff is a type of rock consisting of consolidated volcanic ash ejected from vents during a volcanic eruption. Tuff is sometimes called tufa, particularly when used as construction material, although tufa also refers to a quite different rock. Rock that contains greater than 50% tuff is considered...
  
  

Geological layers

• Alum Bluff Formation
  Alum Bluff Formation
  The Alum Bluff Formation is a Late Oligocene to Early Miocene geologic formation in the central Florida Panhandle.It was originally mapped by Brooks in 1982 and designated the Shoal River Formation.-Age:Period: Paleogene to Neogene...
  
  
• Angoumian
  Angoumian
  The Angoumian is a geological group restricted to the northern Aquitaine Basin. The group consists of two fossiliferous limestone formations deposited during the Turonian.- Etymology :...
  
  
• Arenig
  Arenig
  In geology, the Arenigian refers both to a time interval during the Lower Ordovician period and also to the suite of rocks which were deposited during this interval.-History:...
  
  
• Bioclast
  Bioclast
  Bioclasts are skeletal fragments of marine or land organisms that are found in sedimentary rocks laid down in a marine environment—especially limestone varieties, some of which take on distinct textures and coloration from their predominate bioclasts—that geologists, archaeologists and...
  
  
• Biostratigraphy
  Biostratigraphy
  Biostratigraphy is the branch of stratigraphy which focuses on correlating and assigning relative ages of rock strata by using the fossil assemblages contained within them. Usually the aim is correlation, demonstrating that a particular horizon in one geological section represents the same period...
  
  
• Blue Lias
  Blue Lias
  The Blue Lias is a geologic formation in southern, eastern and western England and parts of South Wales, part of the Lias Group. The Blue Lias consists of a sequence of limestone and shale layers, laid down in latest Triassic and early Jurassic times, between 195 and 200 million years ago...
  
  
• Carnian
  Carnian
  The Carnian is the lowermost stage of the Upper Triassic series . It lasted from about 228.7 till 216.5 million years ago . The Carnian is preceded by the Ladinian and is followed by the Norian...
  
  
• Chalk Group
• Ediacara biota
  Ediacara biota
  The Ediacara biota consisted of enigmatic tubular and frond-shaped, mostly sessile organisms which lived during the Ediacaran Period . Trace fossils of these organisms have been found worldwide, and represent the earliest known complex multicellular organisms.Simple multicellular organisms such as...
  
  
• Elk Point Group
  Elk Point Group
  The Elk Point Group is a stratigraphical unit of Middle Devonian age in the Western Canadian Sedimentary Basin.It takes the name from the town of Elk Point, and was first described in the Anglo-Canadian Elk Point No...
  
  
• Eramosa
  Eramosa
  The Eramosa is a Silurian stratigraphic unit exposed along the Niagara Escarpment Niagara_Escarpment in Ontario and western New York State. In the late nineteenth century it was an important source of building stone in Hamilton, Ancaster and Waterdown , and in the late twentieth century quarries...
  
  
• Galena Group
  Galena Group
  The Galena Group or Galena Limestone refers to a sedimentary sequence of Ordovician limestone that was deposited atop the Decorah Shale. It is part of the Ordovician stratigraphy of the Upper Midwestern United States. It was deposited in a calm marine environment, and is fossiliferous....
  
  
• Hirnantian
  Hirnantian
  The Hirnantian is the seventh and final internationally-recognized stage of the Ordovician Period of the Paleozoic Era. It was of short duration, lasting about 1.9 million years, from 445.6 ± 1.5 to 443.7 ± 1.5 Ma . The early part of the Hirnantian was characterized by cold temperatures, major...
  
  
• La Tour-Blanche Anticline
  La Tour-Blanche Anticline
  The La Tour-Blanche Anticline, also called Chapdeuil Anticline or Chapdeuil-La Tour-Blanche Anticline, is a tectonically caused, dome-like upwarp in the sedimentary succession of the northeastern Aquitaine Basin in France...
  
  
• Mannville Group
  Mannville Group
  The Mannville Group is a stratigraphical unit of Cretaceous age in the Western Canadian Sedimentary Basin.It takes the name from the town of Mannville, Alberta, and was first described in the Northwest Mannville 1 well by A.W...
  
  
• Madison Group
• Mareuil Anticline
  Mareuil Anticline
  The Mareuil Anticline, also called Mareuil-Meyssac Anticline, is a structural high within the sedimentary sequence of the northeastern Aquitaine Basin...
  
  
• Marcellus Formation
  Marcellus Formation
  The Marcellus Formation is a unit of marine sedimentary rock found in eastern North America...
  
  
• Morrison Formation
  Morrison Formation
  The Morrison Formation is a distinctive sequence of Late Jurassic sedimentary rock that is found in the western United States, which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandstone, siltstone and limestone and is light grey, greenish...
  
  
• Orsten
  Orsten
  The Upper Cambrian Orsten fauna includes fossilized organisms preserved in Orsten lagerstätten, notably at Kinnekulle and on the island of Öland, all in Sweden....
  
  
• Ostracod Limestone
  Ostracod Limestone
  The Ostracod Limestone is a Mesozoic geologic formation. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.-See also:* List of dinosaur-bearing rock formations...
  
  
• Redknife Formation
  Redknife Formation
  The Redknife Formation is a stratigraphical unit of Devonian age in the Western Canadian Sedimentary Basin.It takes the name from Redknife River, a tributary of the Mackenzie River, and was first described in the banks of the Trout River, north of Trout Lake, Northwest Territories, at Table Rock...
  
  
• Red River Formation
  Red River Formation
  The Red River Formation is a stratigraphical unit of Upper Ordovician age in the Western Canadian Sedimentary Basin.It takes the name from the Red River of the North, and was first described in outcrop in the Tyndall Stone quarries and along the Red River Valley by A.F...
  
  
• Rock-cut basin
  Rock-cut basin
  A rock-cut basin, in this usage of the term, is a natural phenomenon. They are cylindrical depressions cut into stream or river beds, often filled with water. Such plucked-bedrock pits are created by kolks; powerful vortices within the water currents which spin small boulders around, eroding out...
  
  
• Stoddart Group
  Stoddart Group
  The Stoddart Group is a stratigraphical unit of Mississippian to Early Pennsylvanian age in the Western Canadian Sedimentary Basin.It takes the name from the Stoddart Creek, a creek that flows into Charlie Lake north of Fort St. John, and was first described in well Pacific Fort St. John #23 by...
  
  
• Tithonian
  Tithonian
  In the geologic timescale the Tithonian is the latest age of the Late Jurassic epoch or the uppermost stage of the Upper Jurassic series. It spans the time between 150.8 ± 4 Ma and 145.5 ± 4 Ma...
  
  
• Wenlock Group
  Wenlock Group
  The Wenlock Group , in geology, is the middle series of strata in the Silurian of Great Britain. This group in the typical area in the Welsh border counties contains the following formations: Much Wenlock Limestone Formation, 90–300 ft.; Wenlock Shale, up to 1900 ft.; Woolhope or Barr...
  
  
• White Limestone Formation
  White Limestone Formation
  The White Limestone Formation is a Mesozoic geologic formation. Fossil sauropod tracks have been reported from the formation.-See also:* List of dinosaur-bearing rock formations** List of stratigraphic units with sauropodomorph tracks*** Sauropod tracks...
  
  

Locations on Earth

• Alquézar
  Alquézar
  Alquézar is a municipality in the province of Huesca, in the autonomous community of Aragon, Spain. In 2004, it had a population of 309.Situated on a limestone outcrop of Eocene age to the west of the canyon of the Rio Vero river in the Sierra de Guara national park, the village has grown around a...
  
  
• Aquitaine Basin
• Aymestry Limestone
  Aymestry Limestone
  The Aymestry Limestone is an inconstant limestone deposited in a warm shallow sea near the eastern margin of the Iapetus Ocean. It occurs in England in the Ludlow series of Silurian rocks, between the Upper and Lower Ludlow Shales. It derives its name from Aymestry, Herefordshire, where it may be...
  
  
• Barstow Formation
  Barstow Formation
  The Barstow Formation is a series of limestones, conglomerates, sandstones, siltstones and shales exposed in the Mojave Desert near Barstow, California. It is early to middle Miocene in age, and lends its name to the Barstovian North American land mammal age...
  
  
• Bear Gulch Limestone
  Bear Gulch Limestone
  The Bear Gulch Limestone in Montana is a fossiliferous lagerstätte, a limestone layer laid down in the Mississippian epoch of the Carboniferous period, about 318 mya. This lens of limestone was laid down in a surrounding matrix that indicates a landscape of mudflats and braided channels in fresh...
  
  
• Bennett Island
  Bennett Island
  Bennett Island is the largest of the islands of the De Long group in the northern part of the East Siberian Sea. The area of this island is approximately 150 km² ...
  
  
• Bissett Formation
  Bissett Formation
  The Bissett Formation is a Mesozoic geologic formation. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation....
  
  
• Bladen Nature Reserve
  Bladen Nature Reserve
  Bladen Nature Reserve is a landscape of caves, sinkholes, pristine streams and rivers, undisturbed old growth rainforest and an abundance of highly diverse flora and fauna which includes a great deal of rare and endemic species....
  
  
• Bluegrass Region
  Bluegrass region
  The Bluegrass Region is a geographic region in the state of Kentucky, United States. It occupies the northern part of the state and since European settlement has contained a majority of the state's population and its largest cities....
  
  
• Boodjamulla National Park
  Boodjamulla National Park
  Boodjamulla National Park, formerly known as Lawn Hill National Park, is a national park in the Gulf Country region of northwestern Queensland, Australia. The park is northwest of Mount Isa or northwest of Brisbane....
  
  
• Borschiv
  Borschiv
  Borshchiv is a city in the Ternopil Oblast of western Ukraine. It is the administrative center of the Borshchivskyi Raion and is located at around . City population is 11,382 ....
  
  
• Bullock Creek
  Bullock Creek
  The Bullock Creek Fossil site is one of three known vertebrate fossil sites in the Australia's Northern Territory, along with the Alcoota Fossil Beds on Alcoota Station and the Kangaroo Well site on Deep Well Station. It is located about 550km south-southeast of Darwin, on Camfield Station...
  
  
• Bunda cliffs
  Bunda cliffs
  The Bunda cliffs is an aboriginal name which has been used in South Australia for the name of the Nullarbor coastal cliffs. The usage is not included in national geographic name databases - but the usage is general in South Australia...
  
  
• Bungonia State Recreation Area
  Bungonia State Recreation Area
  The Bungonia State Recreation Area is a nature reserve near the city of Goulburn, New South Wales Australia.The SRA is about east of Goulburn and about south-west of Sydney, and it adjoins the Morton National Park....
  
  
• Caves of the Tullybrack and Belmore hills
  Caves of the Tullybrack and Belmore hills
  The Caves of the Tullybrack and Belmore hills can be found in south-west County Fermanagh, Northern Ireland. It is mainly within Boho parish. The region is also described as the West Fermanagh Scarplands by environmental agencies and shares many similar karst features with the nearby Marble Arch...
  
  
• Cedar Mountain Formation
  Cedar Mountain Formation
  The Cedar Mountain Formation is the name given to distinctive sedimentary rocks in eastern Utah that occur between the underlying Morrison Formation and overlying Naturita Formation . It is composed of non-marine sediments, that is, sediments deposited in rivers, lakes and on flood plains...
  
  
• Chazy Formation
  Chazy Formation
  The Chazy Reef Formation is a mid-Ordovician limestone deposit that consists of some of the oldest reef systems built by a community of organisms rather than the deposit of a limited range of similar organisms, such as Stromatolite mounds deposited by ancient cyanobacteria...
  
  
• Chestnut Ridge, Bedford County
  Chestnut Ridge, Bedford County
  Chestnut Ridge is an elongate hill trending northeast-southwest in west-central Bedford County, Pennsylvania. It is partially forested with rural homes, farms, and notably apple orchards. Four small towns surround it: Schellsburg, New Paris, Fishertown, and Pleasantville...
  
  
• Chocolate Hills
  Chocolate Hills
  The Chocolate Hills is an unusual geological formation in Bohol province, Philippines. According to the latest accurate survey done, there are 1,776 hills spread over an area of more than . They are covered in green grass that turns brown during the dry season, hence the name.The Chocolate Hills...
  
  
• Colemans Quarry
  Colemans Quarry
  Colemans Quarry, is a limestone quarry at Holwell, near Nunney on the Mendip Hills, Somerset, England.The Colemans Quarry complex comprises four pits separated by three roads...
  
  
• Columbus Limestone
  Columbus Limestone
  The Columbus Limestone is a mapped bedrock unit consisting primarily of fossiliferous limestone, and it occurs in Ohio, Pennsylvania, and Virginia in the United States, and in Ontario, Canada.-Stratigraphy:...
  
  
• Coniston Limestone
  Coniston Limestone
  Coniston Limestone is the sedimentary rock formation around Coniston in the English Lake District, and forms part of the Windermere Supergroup. It is late Ordovician or possibly early Silurian in age and rests unconformably upon the Borrowdale Volcanic Group of rocks, which subsided beneath the...
  
  
• Coon Creek Formation
  Coon Creek Formation
  The Coon Creek Formation is a geologic formation located in western Tennessee and extreme northeast Mississippi. It is a sedimentary sandy marl deposit, Late Cretaceous in age, about 70 million years old. The formation is known for producing mosasaurs and plesiosaurs, particularly at Coon Creek in...
  
  
• Cowan Lake (Ohio)
• Crab Island (Lake Champlain)
  Crab Island (Lake Champlain)
  Crab Island is a roughly limestone island situated just outside Plattsburgh Bay in the town of Plattsburgh in Clinton County in upstate New York's Lake Champlain. During the War of 1812, the island was utilized as a military field hospital for convalescent soldiers as well as both British and...
  
  
• Cradle of Humankind
  Cradle of Humankind
  The Cradle of Humankind is a World Heritage Site first named by UNESCO in 1999, about 50 kilometres northwest of Johannesburg, South Africa in the Gauteng province. This site currently occupies ; it contains a complex of limestone caves, including the Sterkfontein Caves, where the 2.3-million...
  
  
• Crato Formation
  Crato Formation
  The Crato Formation is a geologic formation of Early Cretaceous age in northeastern Brazil's Araripe Basin. It is an important Lagerstätte for palaeontologists. The strata were laid down mostly during the early Albian age, about 108 million years ago, in a shallow inland sea...
  
  
• Cumnor Hurst
  Cumnor Hurst
  Cumnor Hurst, also known as Hurst Hill, is a wooded hill in the neighbourhood of the village of Cumnor, Oxfordshire, England. It lies to the north of Boars Hill. In 1974 it was transferred from Berkshire....
  
  
• Cunswick Scar
  Cunswick Scar
  Cunswick Scar is a limestone scar in the Lake District, England. There are extensive views from the large cairn at the top . The scar is listed in Wainwright's Outlying Fells book. Fossils can be found in the limestone on the scar and Cunswick Fell....
  
  
• Dinosaur Valley State Park
  Dinosaur Valley State Park
  - History :Dinosaur Valley State Park, located just northwest of Glen Rose in Somervell County, is a scenic park set astride the Paluxy River. The land for the park was acquired from private owners under the State Parks Bonds Program during 1968 and opened to the public in 1972...
  
  
• Dudley Tunnel
  Dudley Tunnel
  Dudley Tunnel is a canal tunnel on the Dudley Canal Line No 1, England. At about long, it is now the second longest canal tunnel on the UK canal network today....
  
  
• East Kirkton Quarry
  East Kirkton Quarry
  East Kirkton Quarry is a former limestone quarry, now better known as a fossil site known for terrestrial fossils from the fossil-poor "Romer's gap, a 15 million year period at the beginning of the Carboniferous...
  
  
• Elliot Formation
  Elliot Formation
  The Elliot Formation is a geological formation dating to roughly 210 to 190 million years ago and covering the Norian to Sinemurian stages. The Elliot Formation is found in South Africa and Lesotho and is a member of the Stormberg Group. It consists mainly of limestone, sandstone, and mudstone...
  
  
• English Riviera Geopark
  English Riviera Geopark
  The English Riviera Geopark in Torbay is one of ten Geoparks in the United Kingdom, and one of fifty-three worldwide. It is the only urban Geopark, and was declared a Geopark on 16 September 2007...
  
  
• Falls of the Ohio State Park
  Falls of the Ohio State Park
  Falls of the Ohio State Park is a state park in Indiana. It is located on the banks of the Ohio River at Clarksville, Indiana, across from Louisville, Kentucky.The park is part of the Falls of the Ohio National Wildlife Conservation Area...
  
  
• Front Range
  Front Range
  The Front Range is a mountain range of the Southern Rocky Mountains of North America located in the north-central portion of the U.S. State of Colorado and southeastern portion of the U.S. State of Wyoming. It is the first mountain range encountered moving west along the 40th parallel north across...
  
  
• Gem Valley
• Geology of Australia
• Geology of the Canyonlands area
  Geology of the Canyonlands area
  The exposed geology of the Canyonlands area is complex and diverse; 12 formations are exposed in Canyonlands National Park that range in age from Pennsylvanian to Cretaceous. The oldest and perhaps most interesting was created from evaporites deposited from evaporating seawater...
  
  
• Geology of the Capitol Reef area
  Geology of the Capitol Reef area
  The exposed geology of the Capitol Reef area presents a record of mostly Mesozoic-aged sedimentation in an area of North America in and around Capitol Reef National Park. Nearly 10,000 feet of sedimentary strata are found in the Capitol Reef area, representing nearly 200 million years of...
  
  
• Geology of the Dallas–Fort Worth Metroplex
• Geology of Ethiopia
• Geology of the Grand Canyon area
  Geology of the Grand Canyon area
  The geology of the Grand Canyon area exposes one of the most complete and studied sequences of rock on Earth. The nearly 40 major sedimentary rock layers exposed in the Grand Canyon and in the Grand Canyon National Park area range in age from about 200 million to nearly 2 billion years old...
  
  
• Geology of the Grand Teton area
  Geology of the Grand Teton area
  The geology of the Grand Teton area consists of some of the oldest rocks and one of the youngest mountain ranges in North America. The Teton Range, mostly located in Grand Teton National Park, started to grow some 9 million years ago...
  
  
• Geology of the Iberian Peninsula
  Geology of the Iberian Peninsula
  The geology of the Iberian Peninsula consists of the study of the rock formations on the Iberian Peninsula, which includes Spain, Portugal, Andorra, and Gibraltar. The peninsula contains rocks from every age from Ediacaran to Recent, and almost every kind of rock is represented...
  
  
• Geology of Nepal
  Geology of Nepal
  The Himalayan arc extends about 2400 km from Nanga Parbat by the Indus River in northern Pakistan eastward to Namche Barwa by the gorge of the Tsangpo-Brahmaputra in eastern Tibet. About 800 km of this extent is in Nepal; the remainder includes Bhutan and parts of Pakistan, India, and...
  
  
• Geology of the Pyrenees
  Geology of the Pyrenees
  The Pyrenees form part of the huge alpine orogenic system. This 430 kilometre long, roughly east-west striking, intracontinental mountain chain divides France, Spain, and Andorra. It has an extended, polycyclic geological evolution dating back to the Precambrian...
  
  
• Geology of Somerset
  Geology of Somerset
  Somerset is a rural county in the southwest of England, covering . It is bounded on the north-west by the Bristol Channel, on the north by Bristol and Gloucestershire, on the north-east by Wiltshire, on the south-east by Dorset, and on the south west and west by Devon. It has broad central plains...
  
  
• Geology of the Zion and Kolob canyons area
  Geology of the Zion and Kolob canyons area
  The geology of the Zion and Kolob canyons area includes nine known exposed formations, all visible in Zion National Park in the U.S. state of Utah. Together, these formations represent about 150 million years of mostly Mesozoic-aged sedimentation in that part of North America...
  
  
• Gilwern Hill, Powys
  Gilwern Hill, Powys
  Gilwern Hill is a hill about 3 mi / 5 km southeast of Llandrindod Wells in the county of Powys, Wales.-Geology:The hill is composed from a range of lower and middle Ordovician volcaniclastic rocks which form a part of the Builth Inlier...
  
  
• Glen Rose Formation
  Glen Rose Formation
  The Glen Rose Formation is a shallow marine to shoreline geological formation from the lower Cretaceous period exposed over a large area from South Central to North Central Texas...
  
  
• Gurney Slade quarry
  Gurney Slade quarry
  Gurney Slade quarry, is a limestone quarry near Gurney Slade between Binegar and Holcombe, on the Mendip Hills, Somerset, England.Gurney Slade quarry exhibits pale to very dark grey Carboniferous Limestone overlain by red and purple-coloured Triassic breccias and marls with a small faulted block...
  
  
• Haile Quarry site
  Haile Quarry site
  The Haile Quarry or Haile sites are an Early Miocene and Pleistocene assemblage of vertebrate fossils located in the Haile quarries, Alachua County, northern Florida. The assemblage was discovered during phosphate mining, which began in the late 1940s. Haile sites are found in the Alachua Formation...
  
  
• Halecombe
  Halecombe
  Halecombe, is a limestone quarry near Leigh-on-Mendip on the Mendip Hills, Somerset, England.The quarry exhibits pale to dark grey well-bedded Carboniferous Limestone, about 350-320 million years old, dipping steeply and consistently northwards and numerous “fist-sized” calcite inclusions within...
  
  
• Hamilton Group
  Hamilton Group
  The Devonian Hamilton Group is a mapped bedrock unit in New York, Pennsylvania, Maryland, and West Virginia. In Virginia, it is known as the laterally equivalent Millboro Shale.The group is named for the village of Hamilton, New York...
  
  
• Hawkesbury Quarry
  Hawkesbury Quarry
  Hawkesbury Quarry is a 0.25 hectare geological Site of Special Scientific Interest near the village of Hawkesbury Upton, South Gloucestershire, notified in 1967....
  
  
• Hessilhead Limestone
• Hill Country State Natural Area
• Hotavlje
  Hotavlje
  Hotavlje is a village in the Poljanska Sora valley in the Gorenja vas - Poljane Municipality in the Upper Carniola region of Slovenia.The local church is dedicated to Saint Laurence. It is first mentioned in visitation records of the Counts of Gorizia dating to 1520, but its angled apse indicates a...
  
  
• House Range
  House Range
  The House Range is a north-south trending mountain range in west-central Utah. It is famous for Notch Peak, one of the tallest limestone cliffs in the world, and a fossil Lagerstätte of Cambrian age, which has an array of Burgess Shale type fauna, including Elrathia kingii, a trilobite that is...
  
  
• Humpback Rock
  Humpback Rock
  Humpback Rock is a massive greenstone outcrop near the peak of Humpback Mountain with a summit elevation of . The rock is so named for the visual effect of a "hump" it creates on the western face of the mountain...
  
  
• Hunstanton
• Indiana Limestone
  Indiana Limestone
  Indiana Limestone, also known as Bedford Limestone is a common regional term for Salem limestone, a geological formation primarily quarried in south central Indiana between Bloomington and Bedford....
  
  
• Isle La Motte, Vermont
  Isle La Motte, Vermont
  -Notable events:Around 480 Million Years ago when the Chazy Formation was flourishing, Strematoporoid colonies were among the most common builders of the reef.In 1609, Samuel de Champlain debarked on Isle La Motte July 9....
  
  
• Ixkun
  Ixkun
  Ixkun is a pre-Columbian Maya archaeological site, situated in the Petén Basin region of the southern Maya lowlands. It lies to the north of the town of Dolores, in the modern-day department of Petén, Guatemala...
  
  
• John Boyd Thacher State Park
  John Boyd Thacher State Park
  John Boyd Thacher State Park is a state park located 15 miles southwest of Albany, New York near Voorheesville, in Albany County on State Route 157...
  
  
• Kaibab Limestone
  Kaibab Limestone
  The Kaibab is a geologic formation that is spread across the U.S. states of northern Arizona, southern Utah, east central Nevada and southeast California. This geologic unit is part of the Park City Group in Nevada and Utah and is sometimes locally classified as a geologic group in Utah...
  
  
• Kakanui
  Kakanui
  The small town of Kakanui lies on the coast of Otago, in New Zealand, fourteen kilometres to the south of Oamaru. The Kakanui River and its estuary divide the township in two. The part of the settlement south of the river, also known as Kakanui South, formerly "Campbells Bay", was developed as a...
  
  
• Kennetcook River
  Kennetcook River
  The Kennetcook River is a river that flows through Hants County, Nova Scotia. From headwaters near the mouth of the Shubenacadie River, the Kennetcook traverses about 45 kilometres of mostly rural terrain, discharging into the Avon River at Windsor. The Kennetcook cuts through fossiliferous...
  
  
• Keyser Formation
  Keyser Formation
  The Late Silurian to Early Devonian Keyser Formation is a mapped limestone bedrock unit in Pennsylvania, Maryland, Virginia, and West Virginia.-Description:...
  
  
• Kotelny Island
• Latyan Dam
  Latyan Dam
  Latyan Dam is a dam located less than 25 km from Tehran. It is one of the main sources of water for Tehran metropolitan region.-Geology:...
  
  
• Lincolnshire limestone
  Lincolnshire limestone
  The Lincolnshire limestone is a feature of the Inferior Oolite Series of the Middle Jurassic strata of eastern England. It was formed around 165 million years ago, in a shallow, warm sea on the margin of the London Platform and has estuarine beds above and below it...
  
  
• Llandovery Group
  Llandovery Group
  In geology, the Llandovery Group refers to the lowest division of the Silurian period in Britain. It is named after the town of Llandovery in Wales, although Charles Lapworth had proposed the name Valentian for this group in 1879...
  
  
• Madar, Yemen
  Madar, Yemen
  Madar, Yemen is a village about 48km north of Sanaa. In 2003 a local journalist noted the existence of dinosaur footprints in limestone bedrock and brought them to the attention of geologists at the University of Sanaa. The main site of the finds, located at , is approximately 3 km west off the...
  
  
• Majlis al Jinn
  Majlis al Jinn
  Majlis al Jinn also Majlis al-Jinn , local name: Khoshilat Maqandeli is the ninth largest cave chamber in the world, as measured by the surface area of the floor. It ranks higher when measured by volume...
  
  
• Michigan Basin
  Michigan Basin
  The Michigan Basin is a geologic basin centered on the Lower Peninsula of the US state of Michigan. The feature is represented by a nearly circular pattern of geologic sedimentary strata in the area with a nearly uniform structural dip toward the center of the peninsula.The basin is centered in...
  
  
• Middridge Quarry
  Middridge Quarry
  Middridge Quarry is a Site of Special Scientific Interest in the Sedgefield district of County Durham, England. It is a disused quarry, situated alongside the railway line between Newton Aycliffe and Shildon, 1 km south of the village of Middridge....
  
  
• Mooreville Chalk Formation
  Mooreville Chalk Formation
  The Mooreville Chalk Formation is a geological formation in North America, within the U.S. states of Alabama and Mississippi. The strata date back to the early Santonian to the early Campanian stage of the Late Cretaceous. The chalk was formed by pelagic sediments deposited along the eastern edge...
  
  
• Mortimer Forest
  Mortimer Forest
  Mortimer Forest is a forest on the Shropshire/Herefordshire border in England, near the town of Ludlow.-History:Mortimer Forest was an ancient hunting forest, like similar areas including Bircher Common...
  
  
• Mugarra
  Mugarra
  Mugarra is a peak of Biscay, Basque Country , 936 m high, belonging to the Aramotz massif.The Aramotz massif is in the western limit of the Urkiola range. Mugarra continues the line of the Anboto, Alluitz, Aitz Txiki and Untxillaitz and is the eastern limit of the Aramotz massif.Huge limestone...
  
  
• Naracoorte Caves National Park
  Naracoorte Caves National Park
  Naracoorte Caves is a national park near Naracoorte in the Limestone Coast tourism region in the south-east of South Australia . It was officially recognised in 1994 for its extensive fossil record when the site was inscribed on the World Heritage List, along with Riversleigh...
  
  
• Neckar
  Neckar
  The Neckar is a long river, mainly flowing through the southwestern state of Baden-Württemberg, but also a short section through Hesse, in Germany. The Neckar is a major right tributary of the River Rhine...
  
  
• Notch Peak
  Notch Peak
  Notch Peak is a distinctive summit located on Sawtooth Mountain in the House Range, west of Delta, Utah. The peak and the surrounding area are part of the Notch Peak Wilderness Study Area...
  
  
• Nullarbor Plain
  Nullarbor Plain
  The Nullarbor Plain is part of the area of flat, almost treeless, arid or semi-arid country of southern Australia, located on the Great Australian Bight coast with the Great Victoria Desert to its north. It is the world's largest single piece of limestone, and occupies an area of about...
  
  
• Old Rag Mountain
  Old Rag Mountain
  Old Rag Mountain is a popular hiking destination with a summit elevation of , located in the Blue Ridge Mountains of the Shenandoah National Park in Virginia's Madison County, near Sperryville....
  
  
• Onondaga Formation
• Ottawa Valley
• Owl's Hill Nature Center
  Owl's Hill Nature Center
  The Owl's Hill Nature Sanctuary is a wildlife sanctuary in northwestern Williamson County, Tennessee.Fossil traces in Ordovician limestone and 300-year-old giant trees, vestiges of the great eastern deciduous forest that once covered Tennessee, are important collections on the site, as are pioneer...
  
  
• Öland
  Öland
  ' is the second largest Swedish island and the smallest of the traditional provinces of Sweden. Öland has an area of 1,342 km² and is located in the Baltic Sea just off the coast of Småland. The island has 25,000 inhabitants, but during Swedish Midsummer it is visited by up to 500,000 people...
  
  
• Palm Islands Nature Reserve
  Palm Islands Nature Reserve
  The Palm Islands Nature Reserve consists of three flat, rocky islands of eroded limestone and the surrounding sea area, located offshore and northwest of Tripoli, Lebanon....
  
  
• Paluxy River
  Paluxy River
  The Paluxy River is a river in the U.S. state of Texas. It is a tributary of the Brazos River. It is formed by the convergence of the North Paluxy River and the South Paluxy River near Bluff Dale, Texas in Erath County and flows a distance of before joining the Brazos just to the east of Glen...
  
  
• Penmon
• Perth Basin
  Perth basin
  The Perth Basin is a thick sedimentary basin in Western Australia. It lies beneath the Swan Coastal Plain west of the Darling Scarp, representing the western limit of the much older Yilgarn Craton, and extends further west offshore...
  
  
• Pipe Creek Sinkhole
  Pipe Creek Sinkhole
  Pipe Creek Sinkhole near Swayzee in Grant County, Indiana, is one of the most important paleontological sites in the interior of the eastern half of North America, due to preservation, and the exception from 'typical glacial strata mixing' from glaciation...
  
  
• Purbeck Limestone Formation
  Purbeck Limestone Formation
  The Purbeck Limestone Formation is a Mesozoic geologic formation. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.-See also:* List of dinosaur-bearing rock formations...
  
  
• Riversleigh
  Riversleigh
  Riversleigh, in North West Queensland, is Australia's most famous fossil site. The 100 km² area has fossil remains of ancient mammals, birds and reptiles of Oligocene and Miocene age...
  
  
• Rock Point Provincial Park
  Rock Point Provincial Park
  Rock Point Provincial Park is a park located on the north shore of Lake Erie near the mouth of the Grand River in the Carolinian zone of southwestern Ontario. It occupies an area of 1.87 km²....
  
  
• Sacul, El Petén
  Sacul, El Petén
  Sacul is an archaeological site of the Maya civilization located in the upper drainage of the Mopan River, in the Petén department of Guatemala. The city occupied an important trade route through the Maya Mountains. The main period of occupation dates to the Late Classic Period...
  
  
• St. Louis Limestone
  St. Louis Limestone
  The St. Louis Limestone is a large geologic formation covering a wide area of the midwest of the United States. It is named after an exposure at St. Louis, Missouri. It consists of sedimentary limestone with scattered chert beds, including the heavily chertified Lost River Chert Bed in the Horse...
  
  
• Santana Formation
  Santana Formation
  The Santana Formation is a geologic Lagerstätte in northeastern Brazil's Araripe Basin where the states of Pernambuco, Piauí and Ceará come together. The geological formation, named after the village of Santana do Cariri, lies at the base of the Araripe Plateau...
  
  
• Solnhofen Plattenkalk
• Somervell County, Texas
• Stephen Formation
• Summerhill-North Toronto CPR Station
  Summerhill-North Toronto CPR Station
  The North Toronto or Summerhill CPR Station is a former Canadian Pacific Railway station in Toronto, Canada, located on the east side of Yonge Street, approximately 250m south of the Summerhill TTC subway station...
  
  
• Suwannee Limestone
  Suwannee Limestone
  The Suwanee Limestone is an Early Oligocene geologic formation of exposed limestones in North Florida, United States.-Age:Period: PaleogeneEpoch: Early Oligocene...
  
  
• Swartkrans
  Swartkrans
  Swartkrans is a location in South Africa, around from Johannesburg.Swartkrans is a farm near to Sterkfontein, notable for being extremely rich in archaeological material, particularly hominid remains. It was purchased by the University of the Witwatersrand in 1968...
  
  
• Tamiami Formation
  Tamiami Formation
  The Tamiami Formation is a Late Miocene to Pliocene geologic formation in the southwest Florida peninsula.-Age:Period: NeogeneEpoch: Late Miocene to Pliocene...
  
  
• Taynton Limestone Formation
• Tennessee marble
• Torreya Formation
  Torreya Formation
  The Torreya Formation is a Miocene geologic formation with an outcrop in North Florida. It is within the Hawthorn Group.-Age:Period: NeogeneEpoch: Early Miocene...
  
  
• Tyndall Limestone
• Upper Elliot Formation
  Upper Elliot Formation
  The Upper Elliot Formation is a geological formation dating to roughly between 200 to 190 million years ago and covering the Hettangian to Sinemurian stages. The Upper Elliot Formation is found in South Africa and Lesotho and is a member of the Stormberg Group. It consists mainly of limestone,...
  
  
• Walcott-Rust quarry
  Walcott-Rust quarry
  The Walcott-Rust quarry is an excellent example of an obrution Lagerstätten. Unique preservation of trilobite appendages resulted from early consolidation of the surrounding rock, followed by spar filling of the interior cavity within the appendages...
  
  
• Warrior Formation
  Warrior Formation
  The Cambrian Warrior Formation is a mapped limestone bedrock unit in Pennsylvania.-Description:The Warrior Formation is described by Berg and others as gray, thin- to medium-bedded, fossiliferous, cyclic limestone bearing stromatolites, interbedded with shale, siltstone, and sandstone.-Fossils:*...
  
  
• Washtenaw Community College
• Weardale
  Weardale
  Weardale is a dale, or valley, of the east side of the Pennines in County Durham, in England. Large parts of Weardale fall within the North Pennines Area of Outstanding Natural Beauty - the second largest AONB in England and Wales. The upper valley is surrounded by high fells and heather grouse...
  
  
• Wetterstein limestone
  Wetterstein limestone
  Wetterstein limestone and Wetterstein dolomite are the most common names for a carbonate rock from the Middle Triassic epoch of the Ladinian stage, comparable to the German stage in which muschelkalk rock strata were formed....
  
  
• Wills Creek Formation
  Wills Creek Formation
  The Silurian Wills Creek Formation is a mapped bedrock unit in Pennsylvania, Maryland, Virginia, and West Virginia.-Description:The Wills Creek is defined as a moderately well bedded greenish-gray shale containing local limestone and sandstone zones, or more specifically as an olive to...
  
  
• Wren's Nest
  Wren's Nest
  The Wren's Nest is a National Nature Reserve located to the north west of the town centre of Dudley, West Midlands, England. Today, apart from the geological interest, the site is home to a number of species of birds and locally rare flora; the caverns also support large roosting populations of bats...
  
  
• Zhoukoudian
  Zhoukoudian
  Zhoukoudian or Choukoutien is a cave system in Beijing, China. It has yielded many archaeological discoveries, including one of the first specimens of Homo erectus, dubbed Peking Man, and a fine assemblage of bones of the gigantic hyena Pachycrocuta brevirostris...
  
  
• Zitai Formation
  Zitai Formation
  The Zitai Formation is a geological sequence of Middle Ordovician origin, that occurs along the southeastern edge of the Yangtze Platform in southern China. It is a purple-red limestone with a few interspersed yellow-green shale beds. It contains a fossil fauna dominated by trilobites and nautiloids....