Limestone reefs grow in the shallows of tropical seas, taking captive fossilised sea creatures.
It also details fifteen walks, which reveal the geological drama..
This book tells the story of the Peak landscape from its tropical beginnings onwards.
As the seas shift and coastlines change, sandstones build on the banks of a great river delta.
Limestone reefs grow in the shallows of tropical seas, taking captive fossilised sea creatures