Hi, I'm new to this forum and fossils. I am trying to identify some of my finds. I hope the large pictures do not annoy anyone. Any help would be appreciated. How do I determine what time period they date and the kind of fossils? I found this one on a beach in Hatillo, P.R. a few years ago. Someone said it looks like the mold of a Gastorpod (Snail), and possibly a Crinoid Stem right next to it and that there may be fragments of Bivalves or Brachiopods, also. Since I found this on a beach, how do I determine the age? This is a rock that my son found in a park in southern N.J. Someone suggested possibly: Phylum: Bryozoa Class: Stenolaemata Order: Fenestrata ...that is not native to southern N.J. (possibly transported in rock fill). I think I found this one in Virginia. This bone?!? was found by my son in another southern N.J. park during one of his baseball games.