Trace fossils...

belonging to the Scoyenia ichnofacies seen on the underside of this sandstone slab, consisting of the casts of tracks/trails and shallow horizontal burrows in the Permian-age Cutler Formation in Castle Valley, Utah. I’m coming back for this on a sample return mission on my eMTB tomorrow.

UPDATE: Grabbed the nice specimen this afternoon, and now it’s in the rock garden.