Activity Alex Robinson posted an image in the group What is it? from the myFOSSIL app 1 month, 1 week ago 1 month, 1 week ago 1 month, 1 week ago I found this lovely piece in the southern Nevada desert in a dried up river bed. I think it is a stromatolite but am not 100% sure. Any thoughts? #fossil A Trilobite replied 1 month, 1 week ago It looks more like petrified wood, but I’m not sure Leonardo Miranda replied 1 month ago I’ve seen similar formations from similar rocks to this before. l don’t really think it’s a fossil, but simply a characteristic of how this particular type of rock forms.