Cambridge Greensand, Geological formation near Cambridge, England
Cambridge Greensand is a geological layer made of glauconitic marl and chalk mud that spreads across parts of Hertfordshire and Cambridgeshire in eastern England. This formation varies in thickness and sits between older rocks below and chalk deposits above.
This rock layer formed during the Cretaceous period and belongs to the early Cenomanian age. It marks an important boundary in geological history where older rocks like the Gault Formation meet younger chalk deposits.
The formation holds substantial educational value for geology students and researchers, providing essential insights into the Cretaceous period through its fossil records.
The Arlesey Brickpit site offers the clearest view of this formation and allows visitors to examine the layers closely. This location provides exposed rock surfaces ideal for study and observation.
This layer preserves remains of pterosaurs, ichthyosaurs, and dinosaurs that reveal details about ancient marine life. These fossils from the late Albian period offer rare windows into creatures that lived in ancient seas.
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