Its the last day of There are no gaps left on our geological map, but fear not, we have one time period left: the Pleistocene!

This lasted from 2.5 million to 12000 years ago and covers a time of environmental change often called the Ice Age

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Welcome to Day 3 of We hope you are enjoying the tweets and activities so far!

Today we are taking you later into the Carboniferous - the environment has shifted and Yorkshire is now part of an enormous tropical river delta.

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