After the Purbeck beds were laid down a series of earth movements changed the environment of deposition. A huge Wealden river carried sand, clay and grit sediments to a large freshwater lake inhabited by dinosaurs and early mammals. The rock layer is considerably thicker than both the Portland and Purbeck Beds.
Added:
7th Dec 2005 by Diane Earl
Subjects:
Biology, Science
Key Stages:
Key Stage 3, Key Stage 4, Key Stage 4+
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Picture 6 of 12 -Lulworth Types of Rock Wealden Beds
