Dinosaur Poop? and some other fossils
Got these with some flint in a trade.
Anyone have positive ID
The one in back looks to be a scallop shell not sure on others
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The specimen at top center is clearly an articulate brachiopod, and the specimen to the right (with the sequential 'chambers') is a tabulate coral. If these are both from the same site then the site is Paleozoic in age (between Ordovician and Permian). The tabulate corals show up in the fossil record during the Ordovician and their fossils were not seen any later than the Permian period. The articulate brachiopods are still with us, although in much lesser diversity than during the Paleozoic. The other three objects in the photo do not exhibit sufficient detail to know if they are fossils or other interesting objects. Dinosaur remains (even poops [coprolites]) would be expected from strata in the Mesozoic ages (Triassic, Jurassic, or Cretaceous); a series that begins when the Paleozoic ends.
Some examination of a geological map of your area may be useful in identifying both the age, and subsequently the genus of the brachiopod (unless your source person is from elsewhere). Identifying the tabulate coral would probably require a polished thin section (parallel to the ranks of the 'chambers) to extract the necessary details.
Thanks for reading.
Last edited by edibleplantguy; 01-19-2013 at 02:59 PM.
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All were found in wisconsin
The one with a hole i think is bone it sparks on a steel so petrified ill try to take a better pic
As for the the round ones, they don't spark, what would you need to see on them for a better ID?
The "dinosaur poop" might be something called a concretion. In Utah, concretions form in (among other places) in Jurassic sandstones from Iron-rich minerals. Nodules shaped like that are really common and are locally referred to as "Moki Marbles". Other shapes include flat plates, tubes, and lumps of round concretions stuck together. I've seen sandstone-based concretions up here in WI on the south shore of Lake Superior.
Then again, maybe they are dinoturds...!