East Yorkshire RIGS Group East Yorkshire RIGS Group RIGS are Regionally Important Geological and Geomorphological Sites. The East Yorkshire RIGS Group was founded in 1992.
Membership is open to organisations and individuals with an interest in geological conservation.
It covers the geographical area of Watsonian Vice-County no. This is not quite the same as the geopolitical counties of East Yorkshire or the former North Humberside. The boundaries of the area are the eastern coastline, the River Humber, the River Ouse to York to the River Derwent and a continuation to Filey. The Geology of the area consists of Triassic red-beds in the east, Jurassic clays, limestones and sandstones, and Chalk Wolds, with a covering of Quaternary boulder clay in Holderness. The group has selected Regionally Important Geological Sites in East Yorkshire , based on a set of criteria which identified them for their research, educational, historical or geomorphological importance.