Rocks / Chatwell sandstone. Onny valley.

This specimen of Chatwell sandstone was collected on the Onny valley trail, which is on the outskirts of the town of Craven arms, in Shropshire. This is from the higher level of the sandstone, is green in colour,  and packed with numerous shells. The sandstone is in the Caradoc series of the Ordovician period.This concretion was collected a few days ago, August 2021. The location is a quarry at Bwlch-y-Sarnau in Powys. 

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