What are the elongated ‘whale shaped’ hills caused by glacial action?
Post-glacial rebound crustal stress, and earthquakes. Studies of glacial rebound give us information about the flow law of mantle rocks, which is important to the study of mantle convection, plate tectonics and the thermal evolution of the Earth. It also gives insight into past ice sheet history, which is important to glaciology, paleoclimate, and changes in global sea level. Understanding postglacial rebound is also important to our ability to monitor recent global change. Erratic boulders, U-shaped valleys, drumlins, eskers, kettle lakes, bedrock striations are among the common signatures of the Ice Age. In addition, post-glacial rebound has caused numerous significant changes to
Tabular Hills At their western end, beyond the River Rye, the hills join with the north south Hambleton Hills which have a similar geological basis. Striking among the river valleys are Newton Dale and Forge Valley which are glacial run-off channels formed when huge amounts of melt water denied an exit to the North Sea by glacial ice poured over the lowest points in the landscape during the last ice age cutting steeply incised channels. The Hole of Horcum is an unusual scallop shaped valley formed by the action of a line of springs. The Tabular Hills walk links the two southerly