Barbara Allan Posted March 14, 2022 Share Posted March 14, 2022 Scotland, Solway Firth, thought crinoid but friend thinks plant- club moss? Any ideas. Measurements are 20cm x 5cm for “stem” section corals and bivalve shells in rocks around these examples. Carboniferous era. Link to comment Share on other sites More sharing options...
Ludwigia Posted March 14, 2022 Share Posted March 14, 2022 Calamites would be my guess, but let's see what the plant experts still have to say. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
TqB Posted March 14, 2022 Share Posted March 14, 2022 (edited) It's Siphonophyllia, a solitary rugose coral. It's a good size but that genus can get even wider. Welcome to the forum! Edited March 14, 2022 by TqB 4 Tarquin Link to comment Share on other sites More sharing options...
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