I went to the Mazonia South Unit last week for my second ever fossil hunting trip in as many weeks. (I may be developing a problem). On my first trip I didn't find many nodules so I wanted to go back and try hunting in a different area. However I did find what I believe to be fossils in limestone and some pyrite (as identified in another submission-Thanks!). I will post the photo of the limestone sample in another submission as the pictures are too large. The fossil I am most curious about is pictured below. I credit my dog with finding this one as she led me to the place it was laying under an evergreen tree. The first photo shows the side with the fossil while the second photo shows the opposite side. It seems to have a stain on it that follows the same shape of the fossil. I don't know if that is a coincidence or relevant to the id. I'm assuming this is limestone solely based on its color, I could very well be wrong.