Bivalves

map source: MSN

So here we are, 300 million years ago; southern Quebec, France and England near
neighbors.

Been reading about Gault (150 million years ago) clay deposits, which often contain
bivalves. Over the years, I have actually seen two (smallish) bivalve imprints in rock,
one in the Baie des Chaleurs in Gaspésie, one on the banks of the Richelieu river...