Cool thanks I’ll have to try again more thoroughly. Beach combing slightly south is very good for seaglass btw, where the beach curves out next to the shipyard.

I have found them in random spots along the eastern shore of the providence river, Including Bold Point Park, the beach below Sabin Point, and a particular little cove next to the east bay bike path. I don’t have any equipment, I just spend a lot of time picking through rocks. Mostly seed ferns, a couple other similar plant impressions, and one calamite annularia is what i’ve found.

I tried once but didn’t find anything. Do you need tools to break open the layers?