Join Essex Rock & Mineral Society for a fascinating trip through 250 million years of history told through one river!
Summary:
The History Of the Area In One River!
Main image:
from RSSMix.com Mix ID 8239592 http://www.essexwt.org.uk/events/2018/10/23/thames-through-time
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source https://childrenssafetyflooring.tumblr.com/post/178012473030
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