fossilzz Posted August 20, 2019 Share Posted August 20, 2019 These are some devonian finds from Arkona, Ontario, mainly from along the banks of the Ausable river. The formations exposed consist of the Arkona shale, the Hungry Hollow formation and the Widder formation. Link to comment Share on other sites More sharing options...
Kane Posted August 20, 2019 Share Posted August 20, 2019 Just FYI: the Hungry Hollow was reassigned as a member of the Widder Fm. ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
fossilzz Posted August 20, 2019 Author Share Posted August 20, 2019 oh ok. thanks for the info Link to comment Share on other sites More sharing options...
fossilzz Posted August 20, 2019 Author Share Posted August 20, 2019 Link to comment Share on other sites More sharing options...
fossilzz Posted August 20, 2019 Author Share Posted August 20, 2019 Sadly most of the greenops I find are incomplete. Link to comment Share on other sites More sharing options...
Kane Posted August 20, 2019 Share Posted August 20, 2019 10 minutes ago, fossilzz said: Sadly most of the greenops I find are incomplete. I hear that! We excavated for many years, and getting one or two complete greenies was a good day. ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
fossilzz Posted August 20, 2019 Author Share Posted August 20, 2019 They are quite fragile. Any idea what causes the isolated pyritization on their shells? Link to comment Share on other sites More sharing options...
Malcolmt Posted August 20, 2019 Share Posted August 20, 2019 Looks like you were into some good finding..... Hey Kane one or two a season is good finding!!!! Link to comment Share on other sites More sharing options...
Kane Posted August 20, 2019 Share Posted August 20, 2019 1 hour ago, fossilzz said: They are quite fragile. Any idea what causes the isolated pyritization on their shells? There was a lot of sulphide availability in the upper Widder, and so it is common to find a lot of pyritization of worm burrows, goniatites, etc. I've found nearly fully pyritized Greenops in those layers. ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Ludwigia Posted August 20, 2019 Share Posted August 20, 2019 2 hours ago, fossilzz said: Sadly most of the greenops I find are incomplete. But you did at least find one good one and you can be quite happy for that. Pyrite often forms in anaerobic environments, which was the case with these sediments. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
fossilzz Posted August 20, 2019 Author Share Posted August 20, 2019 37 minutes ago, Kane said: There was a lot of sulphide availability in the upper Widder, and so it is common to find a lot of pyritization of worm burrows, goniatites, etc. I've found nearly fully pyritized Greenops in those layers. Interesting. I've noticed that many trace fossils are pyritized in the Widder, as well as seemingly random deposits. Link to comment Share on other sites More sharing options...
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