WebThe Upper Greensand Formation is a Cretaceous formation of Albian to Cenomanian in age, found within the Wessex Basin and parts of the Weald Basin in southern England. It overlies the Gault Clay and underlies the Chalk Group. It varies in thickness from zero to 75 m. It is predominantly a glauconitic fine-grained sandstone, locally becoming silty. WebJan 26, 2024 · the upper greensand forma tion (albian, cretaceous) of dorset, uk 421 Stoliczkaia dispar (d ’O r bi g ny), S. dors etensis Spat h, …
Upper Greensand - DORSET BUILDING STONE
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Heterogeneous mixed-layer clays from the Cretaceous Greensand…
WebMar 1, 2006 · The current controversy about the role of climate or pattern of volcanic activity controlling the clay mineral stratigraphy of the Lower Cretaceous is reviewed. In the lower part of the Upper Cretaceous strata of England, Scotland and Ireland, sand-grade glauconite is particularly abundant. WebGreensand or green sand is a sand or sandstone which has a greenish color. This term is specifically applied to shallow marine sediment that contains noticeable quantities of … WebJun 1, 2024 · Trace fossils at the basal Upper Greensand (Albian, Cretaceous) unconformity surface in east Devon (south-west England) and the nature of the … boa旋鈕官網