H. Pettijohn on Nostr: For #FossilFriday, we're taking a look at not true fossils, but preserved mud cracks. ...

For #FossilFriday, we're taking a look at not true fossils, but preserved mud cracks. Below this incredible natural cast of a Eubrontes track, the wide mudcracks were formed during a period of drought and later preserved by water carrying sediment. (1/3)
#paleontology #ichnology