River Seven
Encyclopedia
The River Seven is a river
in North Yorkshire
, England
.
The River Seven rises on Danby High Moor, in the middle of the North York Moors
, and flows south for about 15 miles or 25 km to meet the River Rye
, at Brawby
.
After leaving Danby High Moor, the river flows through Rosedale
and passes Rosedale Abbey
. In its lower course, it meanders due to interlocking spurs. A number of villages lie along the lower course of the River Seven. Some of these date from the 12th century or earlier, and likely none of them would exist if not for the river. For early settlers, the river may have been the only source of water and fertile
land in its flood plains. They relied on the river for fishing
, and washing. There are fossils in the sedimentary layers in the river, in the Jurassic
layer of rock.
The River Seven is a small river, with not much influence on the geology of the area, although over time it has exposed various rock zones. The lacustrine deposits from the last ice age are exposed and visible in the bed of the river. There are three different time zones (periods) in the area.
The rock types consist of : Corallian Limestone
(top layer), Oxford Clay
, Raven-scar Limestone and Shales
and Ironstone
.
These are split up depending on their rock band and type. Over time the North York Moors
are sliding downhill: you can tell this from the new bands of rock visible in the northern regions.
The river's velocity increases, dependent on the (km) from source.
The velocity of the river Seven is affected by its gradient. A high gradient, as observed near the source, speeds up the flow of the river, with the lower section having shallower gradients and exhibiting meanders. However, the volume of water and channel roughness dominate flow velocities, with the steeper upland channel sections having lower flow volumes and increased friction from channel obstructions such as boulders. Lower section have large, smooth cross section with larger flow volumes, and subsequently greater velocities of flow.
River
A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...
in North Yorkshire
North Yorkshire
North Yorkshire is a non-metropolitan or shire county located in the Yorkshire and the Humber region of England, and a ceremonial county primarily in that region but partly in North East England. Created in 1974 by the Local Government Act 1972 it covers an area of , making it the largest...
, England
England
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...
.
The River Seven rises on Danby High Moor, in the middle of the North York Moors
North York Moors
The North York Moors is a national park in North Yorkshire, England. The moors are one of the largest expanses of heather moorland in the United Kingdom. It covers an area of , and it has a population of about 25,000...
, and flows south for about 15 miles or 25 km to meet the River Rye
River Rye, Yorkshire
The River Rye is a river in the English county of North Yorkshire. It rises just south of the Cleveland Hills, east of Osmotherley, and flows through Hawnby, Rievaulx, Helmsley, Nunnington, West and East Ness, Butterwick, Brawby, and Ryton, before joining the River Derwent at near Malton.On some...
, at Brawby
Brawby
Brawby is a village and civil parish in the Ryedale district of North Yorkshire, England, situated at the confluence of the River Seven and the River Rye. According to the 2001 census Brawby had a population of 164.-Geography:...
.
After leaving Danby High Moor, the river flows through Rosedale
Rosedale
- Australia :* Rosedale, New South Wales* Rosedale, Queensland* Rosedale, Victoria* Rosedale, South Australia. The former Rosenthal.- Canada :* Rosedale, British Columbia* Rosedale, Calgary* Rosedale, Manitoba, rural municipality in the province of Manitoba....
and passes Rosedale Abbey
Rosedale Abbey
Rosedale Abbey is a village located in a spectacular valley in the centre of Rosedale, North Yorkshire, England, midway between Pickering and Castleton in an area of rolling hillsides and stunning scenery...
. In its lower course, it meanders due to interlocking spurs. A number of villages lie along the lower course of the River Seven. Some of these date from the 12th century or earlier, and likely none of them would exist if not for the river. For early settlers, the river may have been the only source of water and fertile
Fertile
The term fertile describes a condition whereby organisms are able to produce physically healthy offspring.Fertile may also refer to:...
land in its flood plains. They relied on the river for fishing
Fishing
Fishing is the activity of trying to catch wild fish. Fish are normally caught in the wild. Techniques for catching fish include hand gathering, spearing, netting, angling and trapping....
, and washing. There are fossils in the sedimentary layers in the river, in the Jurassic
Jurassic
The Jurassic is a geologic period and system that extends from about Mya to Mya, that is, from the end of the Triassic to the beginning of the Cretaceous. The Jurassic constitutes the middle period of the Mesozoic era, also known as the age of reptiles. The start of the period is marked by...
layer of rock.
Geology
- Lower Jurassic
- Middle JurassicMiddle JurassicThe Middle Jurassic is the second epoch of the Jurassic Period. It lasted from 176-161 million years ago. In European lithostratigraphy, rocks of this Middle Jurassic age are called the Dogger....
- Upper Jurassic
The rock types consist of : Corallian Limestone
Corallian Limestone
Corallian Limestone is a coralliferous sedimentary rock, laid down in Jurassic times. It is a hard variety of "coral rag". Building stones from this geological structure tend to be irregular in shape. It is often found close to seams of Portland Limestone...
(top layer), Oxford Clay
Oxford Clay
The Oxford Clay Formation is a Jurassic marine sedimentary rock formation underlying much of southeast England, from as far west as Dorset and as far north as Yorkshire. The Oxford Clay is of middle Callovian to lower Oxfordian age and comprises 2 main facies. The lower facies comprises the...
, Raven-scar Limestone and Shales
Shalës
Shalës is a municipality in the Elbasan District, Elbasan County, central Albania. The municipality consists of the villages Shalës, Licaj, Kurtalli, Xibrake, Xherie and Kodras....
and Ironstone
Ironstone
Ironstone is a sedimentary rock, either deposited directly as a ferruginous sediment or created by chemical repacement, that contains a substantial proportion of an iron compound from which iron either can be or once was smelted commercially. This term is customarily restricted to hard coarsely...
.
These are split up depending on their rock band and type. Over time the North York Moors
North York Moors
The North York Moors is a national park in North Yorkshire, England. The moors are one of the largest expanses of heather moorland in the United Kingdom. It covers an area of , and it has a population of about 25,000...
are sliding downhill: you can tell this from the new bands of rock visible in the northern regions.
Geographical study
Recent surveys of the river from 12 August 2008 revealed this information about the River Seven.- Average Velocity
The river's velocity increases, dependent on the (km) from source.
The velocity of the river Seven is affected by its gradient. A high gradient, as observed near the source, speeds up the flow of the river, with the lower section having shallower gradients and exhibiting meanders. However, the volume of water and channel roughness dominate flow velocities, with the steeper upland channel sections having lower flow volumes and increased friction from channel obstructions such as boulders. Lower section have large, smooth cross section with larger flow volumes, and subsequently greater velocities of flow.
Settlements
- Thorgill
- Rosedale AbbeyRosedale AbbeyRosedale Abbey is a village located in a spectacular valley in the centre of Rosedale, North Yorkshire, England, midway between Pickering and Castleton in an area of rolling hillsides and stunning scenery...
- CroptonCroptonCropton is a village and civil parish in the Ryedale district of North Yorkshire, England. It is on the border of the North Riding Forest Park, 2 miles north west of PickeringCropton Brewery is located to the rear of the New Inn on the edge of the village....
- Appleton-le-MoorsAppleton-le-MoorsAppleton-le-Moors is a village and civil parish in the Ryedale district of North Yorkshire, England. According to the 2001 census it had a population of 183. The village is in the North York Moors National Park, and is near to Pickering and Kirkby Moorside....
- SinningtonSinningtonSinnington is a village and civil parish in the Ryedaledistrict of the county of North Yorkshire, England. According to the 2001 UK census, the parish has a total population of 318 people living in 148 households....
- MartonMarton, RyedaleMarton is a village and civil parish in the Ryedale district of North Yorkshire, England. It is situated approximately west of the market town of Pickering on the River Seven....
- Normanby
- Great Barugh
- BrawbyBrawbyBrawby is a village and civil parish in the Ryedale district of North Yorkshire, England, situated at the confluence of the River Seven and the River Rye. According to the 2001 census Brawby had a population of 164.-Geography:...