St Michael's Mount - AbsoluteAstronomy.com

St Michael's Mount ( meaning "grey rock in the woods") is a tidal island

Tidal island

A tidal island is a piece of land that is connected to the mainland by a natural or man-made causeway that is exposed at low tide and submerged at high tide. Because of the mystique surrounding tidal islands many of them have been sites of religious worship, such as Mont Saint Michel with its...

located 366 m (400.3 yd) off the Mount's Bay

Mount's Bay

Mount's Bay is a large, sweeping bay on the English Channel coast of Cornwall in the United Kingdom, stretching from the Lizard Point to Gwennap Head on the eastern side of the Land's End peninsula. Towards the middle of the bay is St Michael's Mount...

coast of Cornwall

Cornwall

Cornwall is a unitary authority and ceremonial county of England, within the United Kingdom. It is bordered to the north and west by the Celtic Sea, to the south by the English Channel, and to the east by the county of Devon, over the River Tamar. Cornwall has a population of , and covers an area of...

, United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

. It is a civil parish and is united with the town of Marazion

Marazion

Marazion is a civil parish and town in Cornwall, United Kingdom. It is situated on the shore of Mount's Bay, two miles east of Penzance and one mile east of Long Rock.St Michael's Mount is half-a-mile offshore from Marazion...

by a man-made causeway

Causeway

In modern usage, a causeway is a road or railway elevated, usually across a broad body of water or wetland.- Etymology :When first used, the word appeared in a form such as “causey way” making clear its derivation from the earlier form “causey”. This word seems to have come from the same source by...

of granite setts, passable between mid-tide and low water.

The island exhibits a combination of slate

Slate

Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. The result is a foliated rock in which the foliation may not correspond to the original sedimentary layering...

and granite

Granite

Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granite usually has a medium- to coarse-grained texture. Occasionally some individual crystals are larger than the groundmass, in which case the texture is known as porphyritic. A granitic rock with a porphyritic...

(see Geology below). Its Cornish language name-—literally, "the grey rock in the wood"-—may represent a folk memory of a time before Mount's Bay

Mount's Bay

was flooded. Certainly, the Cornish name would be an accurate description of the Mount set in woodland. Remains of trees have been seen at low tides following storms on the beach at Perranuthnoe

Perranuthnoe

Perranuthnoe is a civil parish and a village in southwest Cornwall, United Kingdom. The village is situated on the east side of Mount's Bay approximately one mile east of Marazion and four miles east of Penzance....

, but radiocarbon dating

Radiocarbon dating

Radiocarbon dating is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 to estimate the age of carbon-bearing materials up to about 58,000 to 62,000 years. Raw, i.e. uncalibrated, radiocarbon ages are usually reported in radiocarbon years "Before Present" ,...

established the submerging of the hazel wood at about 1700 BC. The chronicler John of Worcester

John of Worcester

John of Worcester was an English monk and chronicler. He is usually held to be the author of the Chronicon ex chronicis.-Chronicon ex chronicis:...

relates under the year 1099 that St. Michael's Mount was located five or six miles (10 km) from the sea, enclosed in a thick wood, but that on the third day of the nones of November the sea overflowed the land, destroying many towns and drowning many people as well as innumerable oxen and sheep; the Anglo-Saxon Chronicle

Anglo-Saxon Chronicle

The Anglo-Saxon Chronicle is a collection of annals in Old English chronicling the history of the Anglo-Saxons. The original manuscript of the Chronicle was created late in the 9th century, probably in Wessex, during the reign of Alfred the Great...

records under the date 11 November 1099, "The sea-flood sprung up to such a height, and did so much harm, as no man remembered that it ever did before". The Cornish legend of Lyonesse

Lyonesse

Lyonesse is a country in Arthurian legend, particularly in the story of Tristan and Iseult. Said to border Cornwall, it is most notable as the home of the hero Tristan, whose father was king...

, an ancient kingdom said to have extended from Penwith toward the Isles of Scilly

Isles of Scilly

The Isles of Scilly form an archipelago off the southwestern tip of the Cornish peninsula of Great Britain. The islands have had a unitary authority council since 1890, and are separate from the Cornwall unitary authority, but some services are combined with Cornwall and the islands are still part...

, also talks of land being inundated by the sea.

In prehistoric times, St Michael's Mount may have been a port for the tin trade

Tin mining in Britain

Tin mining in Britain took place from prehistoric times until the 20th century. Mention of tin mining in Britain was made by many Classical writers. As South-West Britain was one of the few parts of England to escape glaciation, tin ore was readily available on the surface...

, and Gavin de Beer made a case for it to be identified with the "tin port" Ictis/Ictin mentioned by Posidonius

Posidonius

Posidonius "of Apameia" or "of Rhodes" , was a Greek Stoic philosopher, politician, astronomer, geographer, historian and teacher native to Apamea, Syria. He was acclaimed as the greatest polymath of his age...

.

Historically, St Michael's Mount was a Cornish counterpart of Mont Saint-Michel

Mont Saint-Michel

Mont Saint-Michel is a rocky tidal island and a commune in Normandy, France. It is located approximately one kilometre off the country's north-western coast, at the mouth of the Couesnon River near Avranches...

in Normandy

Normandy

Normandy is a geographical region corresponding to the former Duchy of Normandy. It is in France.The continental territory covers 30,627 km² and forms the preponderant part of Normandy and roughly 5% of the territory of France. It is divided for administrative purposes into two régions:...

, France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

, when it was given to the Benedictine

Benedictine

Benedictine refers to the spirituality and consecrated life in accordance with the Rule of St Benedict, written by Benedict of Nursia in the sixth century for the cenobitic communities he founded in central Italy. The most notable of these is Monte Cassino, the first monastery founded by Benedict...

s, religious order of Mont Saint-Michel, by Edward the Confessor

Edward the Confessor

Edward the Confessor also known as St. Edward the Confessor , son of Æthelred the Unready and Emma of Normandy, was one of the last Anglo-Saxon kings of England and is usually regarded as the last king of the House of Wessex, ruling from 1042 to 1066....

in the 11th century.

St Michael's Mount is known colloquially by locals as simply the Mount.

History

The Mount may be the Mictis of Timaeus

Timaeus (historian)

Timaeus , ancient Greek historian, was born at Tauromenium in Sicily. Driven out of Sicily by Agathocles, he migrated to Athens, where he studied rhetoric under a pupil of Isocrates and lived for fifty years...

, mentioned by Pliny the Elder

Pliny the Elder

Gaius Plinius Secundus , better known as Pliny the Elder, was a Roman author, naturalist, and natural philosopher, as well as naval and army commander of the early Roman Empire, and personal friend of the emperor Vespasian...

in his Naturalis Historia (IV:XVI.104), and the Ictis of Diodorus Siculus

Diodorus Siculus

Diodorus Siculus was a Greek historian who flourished between 60 and 30 BC. According to Diodorus' own work, he was born at Agyrium in Sicily . With one exception, antiquity affords no further information about Diodorus' life and doings beyond what is to be found in his own work, Bibliotheca...

. Both men had access to the now lost texts of the ancient Greek geographer Pytheas

Pytheas

Pytheas of Massalia or Massilia , was a Greek geographer and explorer from the Greek colony, Massalia . He made a voyage of exploration to northwestern Europe at about 325 BC. He travelled around and visited a considerable part of Great Britain...

, who visited the island in the fourth century BC. If this is true, it is one of the earliest identified locations in the whole of western Europe

Europe

Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

and particularly on the island of Britain.

In the fifth century A.D., it is claimed that St. Michael, the Archangel

Michael (archangel)

Michael , Micha'el or Mîkhā'ēl; , Mikhaḗl; or Míchaël; , Mīkhā'īl) is an archangel in Jewish, Christian, and Islamic teachings. Roman Catholics, Anglicans, and Lutherans refer to him as Saint Michael the Archangel and also simply as Saint Michael...

appeared to local fishermen on the Mount, which according to author Richard Freeman Johnson is perhaps a nationalistic twist to a myth.

It may have been the site of a monastery in the 8th - early 11th centuries and Edward the Confessor

Edward the Confessor

gave it to the Norman

Normandy

abbey of Mont Saint-Michel

Mont Saint-Michel

. It was a priory

Priory

A priory is a house of men or women under religious vows that is headed by a prior or prioress. Priories may be houses of mendicant friars or religious sisters , or monasteries of monks or nuns .The Benedictines and their offshoots , the Premonstratensians, and the...

of that abbey until the dissolution of the alien houses by Henry V

Henry V of England

Henry V was King of England from 1413 until his death at the age of 35 in 1422. He was the second monarch belonging to the House of Lancaster....

, when it was given to the abbess and Convent of Syon at Isleworth

Isleworth

Isleworth is a small town of Saxon origin sited within the London Borough of Hounslow in west London, England. It lies immediately east of the town of Hounslow and west of the River Thames and its tributary the River Crane. Isleworth's original area of settlement, alongside the Thames, is known as...

, Middlesex

Middlesex

Middlesex is one of the historic counties of England and the second smallest by area. The low-lying county contained the wealthy and politically independent City of London on its southern boundary and was dominated by it from a very early time...

. It was a resort of pilgrim

Pilgrimage

A pilgrimage is a journey or search of great moral or spiritual significance. Typically, it is a journey to a shrine or other location of importance to a person's beliefs and faith...

s, whose devotions were encouraged by an indulgence

Indulgence

In Catholic theology, an indulgence is the full or partial remission of temporal punishment due for sins which have already been forgiven. The indulgence is granted by the Catholic Church after the sinner has confessed and received absolution...

granted by Pope Gregory

Pope Gregory VII

Pope St. Gregory VII , born Hildebrand of Sovana , was Pope from April 22, 1073, until his death. One of the great reforming popes, he is perhaps best known for the part he played in the Investiture Controversy, his dispute with Henry IV, Holy Roman Emperor affirming the primacy of the papal...

in the 11th century.

The monastic buildings were built during the 12th century but in 1425 as an alien monastery it was suppressed.

Henry Pomeroy captured the Mount, on behalf of Prince John

John of England

John , also known as John Lackland , was King of England from 6 April 1199 until his death...

, in the reign of Richard I

Richard I of England

Richard I was King of England from 6 July 1189 until his death. He also ruled as Duke of Normandy, Duke of Aquitaine, Duke of Gascony, Lord of Cyprus, Count of Anjou, Count of Maine, Count of Nantes, and Overlord of Brittany at various times during the same period...

. John de Vere, 13th Earl of Oxford

John de Vere, 13th Earl of Oxford

John de Vere, 13th Earl of Oxford , the second son of John de Vere, 12th Earl of Oxford, and Elizabeth Howard, was one of the principal Lancastrian commanders during the English Wars of the Roses...

, seized and held it during a siege of 23 weeks against 6,000 of Edward IV's

Edward IV of England

Edward IV was King of England from 4 March 1461 until 3 October 1470, and again from 11 April 1471 until his death. He was the first Yorkist King of England...

troops in 1473. Perkin Warbeck

Perkin Warbeck

Perkin Warbeck was a pretender to the English throne during the reign of King Henry VII of England. By claiming to be Richard of Shrewsbury, Duke of York, the younger son of King Edward IV, one of the Princes in the Tower, Warbeck was a significant threat to the newly established Tudor Dynasty,...

occupied the Mount in 1497. Humphry Arundell, governor of St Michael's Mount, led the rebellion of 1549. During the reign of Queen Elizabeth I

Elizabeth I of England

Elizabeth I was queen regnant of England and Ireland from 17 November 1558 until her death. Sometimes called The Virgin Queen, Gloriana, or Good Queen Bess, Elizabeth was the fifth and last monarch of the Tudor dynasty...

, it was given to Robert Cecil

Robert Cecil, 1st Earl of Salisbury

Robert Cecil, 1st Earl of Salisbury, KG, PC was an English administrator and politician.-Life:He was the son of William Cecil, 1st Baron Burghley and Mildred Cooke...

, Earl of Salisbury, by whose son it was sold to Sir Francis Basset. During the Civil War

English Civil War

The English Civil War was a series of armed conflicts and political machinations between Parliamentarians and Royalists...

, Sir Arthur Basset, brother of Sir Francis, held the Mount against the parliament until July 1646.

In 1755 the Lisbon earthquake caused a tsunami

Tsunami

A tsunami is a series of water waves caused by the displacement of a large volume of a body of water, typically an ocean or a large lake...

to strike the Cornish coast over 1000 miles (1,609.3 km) away. The sea rose six feet in 10 minutes at St Michael's Mount, ebbed at the same rate, and continued to rise and fall for five hours. The 19th-century French writer Arnold Boscowitz claimed that "great loss of life and property occurred upon the coasts of Cornwall."

In the late 19th century the skeleton of an anchorite

Anchorite

Anchorite denotes someone who, for religious reasons, withdraws from secular society so as to be able to lead an intensely prayer-oriented, ascetic, and—circumstances permitting—Eucharist-focused life...

was discovered when a chamber was found beneath the castle's chapel. When the anchorite died of illness or natural causes, the chamber had been sealed off to become his tomb. The Mount was sold in 1659 to Colonel John St Aubyn. His descendant, Lord St Levan, continues to be the "tenant" of the Mount but has ceased to be resident there, his nephew, James St Aubyn, taking up residency and management of the Mount in 2004.

Little is known about the village before the beginning of 18th century, save that there were a few fishermen's cottages and monastic cottages. After improvements to the harbour in 1727, St Michael's Mount became a flourishing seaport, and by 1811 there were 53 houses and four streets. The population peaked in 1821, when the island had 221 persons. There were three schools, a Wesleyan chapel, and three public houses, mostly used by visiting sailors. The village went into decline following major improvements to nearby Penzance harbour and the extension of the railway to Penzance in 1852, and many of the houses and buildings were demolished.

The Mount was fortified during the Second World War

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

during the invasion crisis of 1940-41

British anti-invasion preparations of World War II

British anti-invasion preparations of the Second World War entailed a large-scale division of military and civilian mobilisation in response to the threat of invasion by German armed forces in 1940 and 1941. The British army needed to recover from the defeat of the British Expeditionary Force in...

. Three pillboxes

British hardened field defences of World War II

British hardened field defences of World War II were small fortified structures constructed as a part of British anti-invasion preparations. They were popularly known as pillboxes by reference to their shape.-Design and development:...

can be seen to this day.

Sixty-five years after the Second World War, it was discovered through archives that the former Nazi foreign minister and one time ambassador to Britain, Joachim von Ribbentrop

Joachim von Ribbentrop

Ulrich Friedrich Wilhelm Joachim von Ribbentrop was Foreign Minister of Germany from 1938 until 1945. He was later hanged for war crimes after the Nuremberg Trials.-Early life:...

, had wanted to live on the Mount after the planned German conquest. During his time in Britain in the 1930s, in which he had initially proposed an alliance with Nazi Germany, he had become an anglophile and hoped one day to retire in Cornwall.

Local government

Until recent times both the Mount and the town of Marazion formed part of the parish of St Hilary

St Hilary, Cornwall

St Hilary is a civil parish and village in west Cornwall, United Kingdom. It is situated approximately five miles east of Penzance and four miles south of Hayle.Chynoweth is an area immediately north of St Hilary....

. St Michael's Mount forms its own civil parish for local government purposes. Currently, this takes the form of a parish meeting as opposed to a parish council (that is, a yearly meeting of electors that does not elect councillors). The current chairman of the St Michael's Mount parish meeting is James St Aubyn.

The island today

The chapel

Chapel

A chapel is a building used by Christians as a place of fellowship and worship. It may be part of a larger structure or complex, such as a church, college, hospital, palace, prison or funeral home, located on board a military or commercial ship, or it may be an entirely free-standing building,...

is extra-diocesan

Diocese

A diocese is the district or see under the supervision of a bishop. It is divided into parishes.An archdiocese is more significant than a diocese. An archdiocese is presided over by an archbishop whose see may have or had importance due to size or historical significance...

, and the castle

Castle

A castle is a type of fortified structure built in Europe and the Middle East during the Middle Ages by European nobility. Scholars debate the scope of the word castle, but usually consider it to be the private fortified residence of a lord or noble...

is the official residence of Lord St Levan

Baron St Levan

Baron St Levan, of St Michael's Mount in the County of Cornwall, is a title in the Peerage of the United Kingdom. It was created on 4 July 1887 for the former Member of Parliament Sir John St Aubyn, 2nd Baronet. He had previously represented Cornwall West in House of Commons as a Liberal and St...

. Many relics, chiefly armour and antique furniture, are preserved in the castle. The chapel of St Michael

Michael (archangel)

, a fifteenth century building, has an embattled tower, in one angle of which is a small turret

Turret

In architecture, a turret is a small tower that projects vertically from the wall of a building such as a medieval castle. Turrets were used to provide a projecting defensive position allowing covering fire to the adjacent wall in the days of military fortification...

, which served for the guidance of ships. Chapel Rock, on the beach, marks the site of a shrine

Shrine

A shrine is a holy or sacred place, which is dedicated to a specific deity, ancestor, hero, martyr, saint, daemon or similar figure of awe and respect, at which they are venerated or worshipped. Shrines often contain idols, relics, or other such objects associated with the figure being venerated....

dedicated to the Virgin Mary, where pilgrims paused to worship before ascending the Mount. A few houses are built on the hillside facing Marazion, and a spring supplies them with water.

Some studies indicate that any rise in ocean waters as well as existing natural erosion would put some of the Cornwall coast at risk, including St. Michael's Mount.

St Michael's Mount is still owned by the St Aubyn family

St Aubyn Baronets

There have been two Baronetcies created for members of the St Aubyn family, one in the Baronetage of England and one in the Baronetage of the United Kingdom....

, but visitor access is controlled by the National Trust

National Trust for Places of Historic Interest or Natural Beauty

The National Trust for Places of Historic Interest or Natural Beauty, usually known as the National Trust, is a conservation organisation in England, Wales and Northern Ireland...

.

There is a row of eight houses at the back of the present village; they were built in 1885 and are known as Elizabeth Terrace. A spring supplies them with water. Some of the houses are occupied by staff working in the castle and elsewhere on the island.

The island cemetery

Cemetery

A cemetery is a place in which dead bodies and cremated remains are buried. The term "cemetery" implies that the land is specifically designated as a burying ground. Cemeteries in the Western world are where the final ceremonies of death are observed...

(currently no public access) contains the graves of former residents of the island and several drowned sailors. There are also buildings that were formerly the steward's house, a changing-room for bathers, the stables, the laundry, a barge house, a sail loft (now a restaurant), and two former inns. A former bowling green

Bowling green

A bowling green is a finely-laid, close-mown and rolled stretch of lawn for playing the game of lawn bowls.Before 1830, when Edwin Beard Budding invented the lawnmower, lawns were often kept cropped by grazing sheep on them...

adjoins one of the buildings.

One of the most noteworthy points of interest on the island is the island's own underground railway, which is still used to transport goods from the harbour up to the castle. It was built by tin miners around 1900, replacing the pack horses which had previously been used. Due to the steep gradient, it cannot be used for passengers. The National Trust currently does not permit public access or viewing of the railway.

The harbour, widened in 1823 to allow vessels of 500 tons to enter, has a pier dating from the fifteenth century which was subsequently enlarged and restored. Queen Victoria landed at the harbour from the royal yacht in 1846, and a brass inlay of her footstep can be seen at the top of the landing stage. King Edward VII's footstep is also visible near the bowling-green. In 1967 the Queen Mother

Elizabeth Bowes-Lyon

Elizabeth Angela Marguerite Bowes-Lyon was the queen consort of King George VI from 1936 until her husband's death in 1952, after which she was known as Queen Elizabeth The Queen Mother, to avoid confusion with her daughter, Queen Elizabeth II...

entered the harbour in a pinnace

Pinnace (ship's boat)

As a ship's boat the pinnace is a light boat, propelled by sails or oars, formerly used as a "tender" for guiding merchant and war vessels. In modern parlance, pinnace has come to mean a boat associated with some kind of larger vessel, that doesn't fit under the launch or lifeboat definitions...

from the royal yacht Britannia

HMY Britannia

Her Majesty's Yacht Britannia is the former Royal Yacht of the British monarch, Queen Elizabeth II. She was the 83rd such vessel since the restoration of King Charles II in 1660. She is the second Royal yacht to bear the name, the first being the famous racing cutter built for The Prince of Wales...

Geology

The rock exposures around St Michael's Mount provide an opportunity to see many features of the geology of Cornwall

Geology of Cornwall

The Geology of Cornwall is dominated by its granite backbone, part of the Cornubian batholith, formed during the Variscan orogeny. Around this is an extensive metamorphic aureole formed in the mainly Devonian slates that make up most of the rest of the county...

in a single locality. The mount is made of the uppermost part of a granite

Granite

intrusion into metamorphosed

Metamorphic rock

Metamorphic rock is the transformation of an existing rock type, the protolith, in a process called metamorphism, which means "change in form". The protolith is subjected to heat and pressure causing profound physical and/or chemical change...

Devonian

The Devonian is a geologic period and system of the Paleozoic Era spanning from the end of the Silurian Period, about 416.0 ± 2.8 Mya , to the beginning of the Carboniferous Period, about 359.2 ± 2.5 Mya...

mudstone

Mudstone

Mudstone is a fine grained sedimentary rock whose original constituents were clays or muds. Grain size is up to 0.0625 mm with individual grains too small to be distinguished without a microscope. With increased pressure over time the platey clay minerals may become aligned, with the...

s or pelite

Pelite

Pelite is old and currently not widely used field terminology for a clayey fine-grained clastic sediment or sedimentary rock, i.e. mud or mudstone. It is equivalent to the Latin-derived term lutite. More commonly, metamorphic geologists currently use pelite for a metamorphosed fine-grained...

s. The granite is itself mineralised with a well-developed sheeted greisen

Greisen

Greisen is a highly altered granitic rock or pegmatite. Greisen is formed by autogenic alteration of a granite and is a class of endoskarn.Greisens appear as highly altered rocks, partly coarse, crystalline granite, partly vuggy with miarolitic cavities, disseminated halide minerals such as...

vein system. Due to its geology the southern coast of the island was designated a Site of Special Scientific Interest

Site of Special Scientific Interest

A Site of Special Scientific Interest is a conservation designation denoting a protected area in the United Kingdom. SSSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in Great Britain are based upon...

in 1995.

Granites

There are two types of granite visible on the mount. Most of the intrusion is a tourmaline

Tourmaline

Tourmaline is a crystal boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a semi-precious stone and the gem comes in a wide variety of colors...

muscovite

Muscovite

Muscovite is a phyllosilicate mineral of aluminium and potassium with formula KAl22, or 236. It has a highly-perfect basal cleavage yielding remarkably-thin laminæ which are often highly elastic...

granite which is variably porphyritic

Porphyritic

Porphyritic is an adjective used in geology, specifically for igneous rocks, for a rock that has a distinct difference in the size of the crystals, with at least one group of crystals obviously larger than another group...

. This is separated from a biotite

Biotite

Biotite is a common phyllosilicate mineral within the mica group, with the approximate chemical formula . More generally, it refers to the dark mica series, primarily a solid-solution series between the iron-endmember annite, and the magnesium-endmember phlogopite; more aluminous endmembers...

muscovite granite by pegmatite

Pegmatite

A pegmatite is a very crystalline, intrusive igneous rock composed of interlocking crystals usually larger than 2.5 cm in size; such rocks are referred to as pegmatitic....

Devonian Pelites

Originally laid down as mudstones these pelites were regionally metamorphosed and deformed (mainly folded

Fold (geology)

The term fold is used in geology when one or a stack of originally flat and planar surfaces, such as sedimentary strata, are bent or curved as a result of permanent deformation. Synsedimentary folds are those due to slumping of sedimentary material before it is lithified. Folds in rocks vary in...

here) by the Variscan orogeny

Variscan orogeny

The Variscan orogeny is a geologic mountain-building event caused by Late Paleozoic continental collision between Euramerica and Gondwana to form the supercontinent of Pangaea.-Naming:...

. They were then affected by the intrusion

Intrusion

An intrusion is liquid rock that forms under Earth's surface. Magma from under the surface is slowly pushed up from deep within the earth into any cracks or spaces it can find, sometimes pushing existing country rock out of the way, a process that can take millions of years. As the rock slowly...

of the granite, which caused further contact metamorphism, locally forming a hornfels

Hornfels

Hornfels is the group designation for a series of contact metamorphic rocks that have been baked and indurated by the heat of intrusive igneous masses and have been rendered...

, and mineralisation.

Mineralisation

The best developed mineralisation is found within the uppermost part of the granite itself in the form of sheeted greisen veins. These steep W-E trending veins are thought to have formed by hydraulic fracturing

Hydraulic fracturing

Considerable controversy surrounds the current implementation of hydraulic fracturing technology in the United States. Hydraulic fracturing, or fracking, is the process of utilizing pressurized water, or some other liquid, to fracture rock layers and release petroleum, natural gas, or other...

when the fluid pressure at the top of the granite reached a critical level. The granite was fractured and the fluids altered the granite by replacing feldspar

Feldspar

Feldspars are a group of rock-forming tectosilicate minerals which make up as much as 60% of the Earth's crust....

s with quartz

Quartz

Quartz is the second-most-abundant mineral in the Earth's continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. There are many different varieties of quartz,...

and muscovite. The fluids were also rich in boron

Boron

Boron is the chemical element with atomic number 5 and the chemical symbol B. Boron is a metalloid. Because boron is not produced by stellar nucleosynthesis, it is a low-abundance element in both the solar system and the Earth's crust. However, boron is concentrated on Earth by the...

, tin

Tin

Tin is a chemical element with the symbol Sn and atomic number 50. It is a main group metal in group 14 of the periodic table. Tin shows chemical similarity to both neighboring group 14 elements, germanium and lead and has two possible oxidation states, +2 and the slightly more stable +4...

and tungsten

Tungsten

Tungsten , also known as wolfram , is a chemical element with the chemical symbol W and atomic number 74.A hard, rare metal under standard conditions when uncombined, tungsten is found naturally on Earth only in chemical compounds. It was identified as a new element in 1781, and first isolated as...

and tourmaline, wolframite

Wolframite

Wolframite WO4, is an iron manganese tungstate mineral that is the intermediate between ferberite and huebernite . Along with scheelite, the wolframite series are the most important tungsten ore minerals. Wolframite is found in quartz veins and pegmatites associated with granitic intrusives...

and cassiterite

Cassiterite

Cassiterite is a tin oxide mineral, SnO2. It is generally opaque, but it is translucent in thin crystals. Its luster and multiple crystal faces produce a desirable gem...

are common in the greisen veins. As the area cooled the veins became open to fluids from the surrounding country rock

Country rock (geology)

Country rock is a geological term meaning the rock native to an area. It is similar and in many cases interchangeable with the terms basement and wall rocks....

and these deposited sulphides e.g. chalcopyrite

Chalcopyrite

Chalcopyrite is a copper iron sulfide mineral that crystallizes in the tetragonal system. It has the chemical composition CuFeS2. It has a brassy to golden yellow color and a hardness of 3.5 to 4 on the Mohs scale. Its streak is diagnostic as green tinged black.On exposure to air, chalcopyrite...

and stannite

Stannite

Stannite is a mineral, a sulfide of copper, iron, and tin. The chemical formula Cu2FeSnS4. Zinc commonly occurs with the iron and trace germanium may be present. Stannite is used as an ore of tin, consisting of approximately 28% tin, 13% iron, 30% copper, 30% sulfur by mass...

. Greisen veins are also locally developed within the pelites.

In popular culture

"Mt Saint Michel + Saint Michaels Mount" is the title of an experimental electronic track by musician Aphex Twin

Aphex Twin

Richard David James , best known under the pseudonym Aphex Twin, is an Irish-born electronic musician and composer described as "the most inventive and influential figure in contemporary electronic music"...

, who grew up in Cornwall.

St Michael's Mount was one of the locations featured in the BBC One "Balloon" Idents.

St Michael's Mount was used in the 1979 film Dracula as Castle Dracula and also in the 2003 film Johnny English
Johnny English
Johnny English is a 2003 British action comedy film parodying the James Bond secret agent genre. The film stars Rowan Atkinson as the incompetent titular English spy, with John Malkovich, Natalie Imbruglia, Tim Pigott-Smith and Ben Miller in supporting roles...

as the exterior of the character Pascal Sauvage's French chateau.

In the 1983 James Bond film Never Say Never Again
Never Say Never Again
Never Say Never Again is a 1983 spy film based on the James Bond novel Thunderball, which was previously filmed in 1965 as Thunderball...

, two guided missiles armed with nuclear warheads fly over the English countryside and out to sea, passing directly over St Michael's Mount.

In Michael Moorcock's

Michael Moorcock

Michael John Moorcock is an English writer, primarily of science fiction and fantasy, who has also published a number of literary novels....

series of Fantasy novels about Prince Corum

Corum Jhaelen Irsei

Corum Jhaelen Irsei is the name of a fictional fantasy hero in a series of two trilogies written by author Michael Moorcock.- Plot summary :...

, a fictionalised version of St Michael's Mount appears as Moidel's Mount.

External links

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