PastaP Posted October 27, 2018 Share Posted October 27, 2018 I have no experience IDing fossils but found this one on a trail we hike with our dog daily. The location has lots of flat rocks just at the surface or under. The area is part of the St Lawrence lowlands. Thanks! Link to comment Share on other sites More sharing options...
Scylla Posted October 27, 2018 Share Posted October 27, 2018 Looks like a baculite Link to comment Share on other sites More sharing options...
Ludwigia Posted October 27, 2018 Share Posted October 27, 2018 I'd say orthoceratid nautiloid. As far as I know, the area around Kingston is Paleozoic, mainly Ordovician sediments and Precambrian crystalline. 5 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Kane Posted October 27, 2018 Share Posted October 27, 2018 +1 for orthocone nautiloid in cross-section, Ordovician in age. 2 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Scylla Posted October 28, 2018 Share Posted October 28, 2018 Did some reading. I was using baculite and orthocerus as synonyms, but that would be akin to saying a ammonite and nautilus are the same. Also they existed in different time periods. So uncoiled cephalopod or one of the above is a safer answer. 1 Link to comment Share on other sites More sharing options...
FossilDAWG Posted October 28, 2018 Share Posted October 28, 2018 It is a straight-shelled (= orthocerid) nautiloid in the genus Actinoceras. These nautiloids had a large siphuncle (the tube structure up the middle) and camerae (chambers on the sides) filled with dense secondary deposits. This weighted the shell, and it is thought that the actinocerids were predators that prowled the sea floor (sort of like modern octopuses), in contrast to other nautiloids that had shells without deposits and were active pelagic swimming predators (sort of like modern squid). These fossils are common in some of the more massive Ordovician limestone formations (such as the Gull River) in southern Ontario and the Ottawa area. Don 3 Link to comment Share on other sites More sharing options...
PastaP Posted October 29, 2018 Author Share Posted October 29, 2018 Wow. This has been very helpful! Thank you! Link to comment Share on other sites More sharing options...
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