Activity Jake Morrison posted an image in the group What is it? from the myFOSSIL app 3 weeks, 2 days ago 3 weeks, 2 days ago 3 weeks, 2 days ago Fossil? Found in the Mojave Desert a few years back. #fossil Victor Perez replied 3 weeks, 2 days ago These are pseudofossils called dendrites. It’s a chemical precipitate, likely either manganese oxide or aluminum oxide. Sam Ocon replied 2 weeks, 3 days ago I agree, Victor! Jim Barkley replied 1 week, 6 days ago love the dendrites!