Dr Katie StrangJul 30, 2023
Here’s some wee 330 million year old crinoid ossicles that wonderfully illustrate their five-fold radial symmetry. Nature is awesome 🖤 #ScottishFossils #ScottishGeology
Show threadFor the love of humanityJul 30, 2023
@palaeokatie
Daughter now looking up ossicles. Thanks!
Show threadDr Katie Strang
@equalitysiren there’s something good info on the British Geological Survey website 😀 https://www.bgs.ac.uk/discovering-geology/fossils-and-geological-time/crinoids/
Crinoids - British Geological Survey

Crinoids are an ancient fossil group that first appeared in the seas of the Middle Cambrian, about 300 million years before dinosaurs.

British Geological Survey
Jul 30, 2023 at 9:36pmWeb
Show threadFor the love of humanityJul 30, 2023
@palaeokatie
Thank you for the link!