Cliffs at Hunstanton,Norfolk showing three distinct layers of rock; nearest the beach is Carstone (40-58ft,12-17m thick),thin layer of Red Rock (4ft 1. 2m) topped by Cenomanian chalk (18ft,5. 5m). Carstone (ginger brown) is a coarse & gritty sandstone from the Lower Cretaceous. It contains large quantities of iron & the minerals kyanite,staurolite,tourmaline,rutile & zircon. The stratum of Red Rock (young lower Cretaceous) is a continuation of the Gault Clay & consists of a pink ferruginous (iron) limestone layer with peebles scattered in it. The Cenomanian chalk layer (Upper Cretaceous) contains fine calcite crystals,making this chalk harder than average | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Burgess, Dr. Jeremy |
Taille de l’image : | 3642 px × 3639 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |