We start our journey 100 million years ago as the Cretaceous seas in which thick sequences of chalk were deposited. It is the chalk bed-rock
We start our journey 100 million years ago as the Cretaceous seas in which thick sequences of chalk were deposited. It is the chalk bed-rock which influences the distinctive landscape of the Chilterns. We shall also consider the evidence for climate change over the last 2.5million years, before discussing the recent past and the chalk extraction in the 20th Century. Bring your binoculars and walking boots!