Activity Max Bruggman posted a new specimen in the group Astonishing Arthropods from the myFOSSIL app 1 year, 5 months ago 1 year, 5 months ago 1 year, 5 months ago Max Bruggman has contributed specimen mFeM 96837 to myFOSSIL! Daniel Park replied 1 year, 5 months ago Seems to be gastropod shells embedded in rock. Nice specimen! Chloe Geddes replied 1 year, 5 months ago That is actually from wyoming! The bed is of opalized gastropods (snail), very cool! I have found it around rock springs.