River Seven

The River Seven is a river in North Yorkshire, England.

The Seven rises on Danby High Moor and flows south to meet the River Rye at Brawby.

The River Seven starts at its source in the North Yorkshire Moors it flows down to its middle course where it meanders due to interlocking spurs. The middle course runs mainly through Danby High Moor. Many settlements are built along the path of the River Seven. All of them would not have been there if it was not for the river. For 18th century settlers the river was the only source of water and fertile land in it's flood plains. They relied on the river for fishing, washing and water supplies. There are fossils in the sedimentary layers in the river , in the Jurassic layer of rock.

Geology

The River Seven is a small river with not much influence on the geology in the area, overtime it has exposed various rock zones. The lacustrine deposits from the last ice age are exposed and visible at the bed of the river. There is three different time zones (periods) in the area.
* Lower Jurassic
* Middle Jurassic
* Upper JurassicThe 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. Overtime the North Yorkshire Moors is sliding down hill you can tell this from the new bands of rock visible in the northern regions.

Volumetric flow rate, is the volume of water that passes through a certain point in a river measured in cubic meters per second (1 m³/s = 35.51 ft³/s) or cubic feet per second. this is always changing depending on the limiting factors. Such as Gradient, Precipitation and the Velocity.

Interlocking 'An interlocking spur is a natural feature which occurs in a river's upper course, where upward erosion is the dominant force in determining the river's course.' they are mainly formed when the valley juts out in a river or where there is a variation in rock types and features.

Settlements

* Thorgill
* Rosedale Abbey
* Cropton
* Appleton-le-Moors
* Sinnington
* Marton
* Normanby
* Great Barugh
* Brawby

References

http://www.normanby.info/riverseven.htm

External links

* [http://www.normanby.info/riverseven.htm Pictures of the River Seven]