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Your search for “%22billings shale%22” gave approximately 3 results:
Image: Triarthrus rougensis
Image: Triarthrus spinosus
Image: Pseudogygites lantimarginatus
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"Xenophanes of Kolophon ... believes that once the earth was mingled with the sea, but in the course of time it became freed from moisture; and his proofs are such as these: that shells are found in the midst of the land and among the mountains, that in the quarries of Syracuse the imprints of a fish and of seals had been found, and in Paros the imprint of an anchovy at some depth in the stone, and in Melite shallow impressions of all sorts of sea products. He says that these imprints were made when everything long ago was covered with mud, and then the imprint dried in the mud. ", Hippolytus
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Black River-Trenton Brachiopoda Cheirocystis Cobourg Cooper Crinoids Echinoderms Fossils Gatineau Hull Isotelus Pelecypoda Triarthrus Triarthrus canadensis Triarthrus spinosus Trilobita abundantly analysis animal area billings formation billings shale canada cannot certain classes conclusion corals diagnostic divisions echinoderm fauna forms genera generalized generic identification interior limestone most north america number ontario ottawa poorly preserved pseudogygites pseudogygites latimarginatus reflected represented species specimens stromatoporoids structure themselves trilobite upon upoon usually valves
