The white chalk is a deep layer of pure limestone. The youngest rock at Lulworth, being 97 million years old. The chalk was deposited very slowly in a clear shallow sea surrounded by a desert and consists of the remains of trillions of minute marine organisms.
Added:
7th Dec 2005 by Diane Earl
Subjects:
Geography, Science
Key Stages:
Key Stage 3, Key Stage 4, Key Stage 4+
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Picture 11 of 12 -Lulworth �Types of Rock � Chalk
