Dsailor Posted March 26, 2017 Share Posted March 26, 2017 Hi Folks, I found this rock and I think they are Graptolites but I am not sure. They were found in New York state but I do not know the formation or age since the rock was part of an erosion control barrier in another site. Under magnification, some have a definite serrated edge. Thanks for your help, Dom Link to comment Share on other sites More sharing options...
Dsailor Posted March 27, 2017 Author Share Posted March 27, 2017 Link to comment Share on other sites More sharing options...
Peat Burns Posted March 27, 2017 Share Posted March 27, 2017 Could they be, rather, Tentaculites ? 2 Link to comment Share on other sites More sharing options...
Al Dente Posted March 27, 2017 Share Posted March 27, 2017 I agree with tentaculites. 1 Link to comment Share on other sites More sharing options...
Peat Burns Posted March 27, 2017 Share Posted March 27, 2017 That's a nice slab by the way. Somebody will probably be along with a link to a paper or two on paleocurrents Link to comment Share on other sites More sharing options...
Dsailor Posted March 27, 2017 Author Share Posted March 27, 2017 10 minutes ago, Peat Burns said: Could they be, rather, Tentaculites ? I have no idea, man, since I just had to google what "tentaculites were. They do look very similar. Thanks Link to comment Share on other sites More sharing options...
Peat Burns Posted March 27, 2017 Share Posted March 27, 2017 6 minutes ago, Dsailor said: I have no idea, man, since I just had to google what "tentaculites were. They do look very similar. Thanks I'm pretty sure they are Tentaculites. I just exercise some extra caution regarding absolutes when identifying from photos and doing so on my small phone screen Link to comment Share on other sites More sharing options...
Dsailor Posted March 27, 2017 Author Share Posted March 27, 2017 It seems not too much is known about them beside they may be related to brachiopods. They are cool little fossils though Link to comment Share on other sites More sharing options...
Peat Burns Posted March 27, 2017 Share Posted March 27, 2017 23 minutes ago, Dsailor said: It seems not too much is known about them beside they may be related to brachiopods. They are cool little fossils though I hadn't heard that. Last I knew is they might be related to molluscs. They are definitely very cool. That's a great plate you have there. Link to comment Share on other sites More sharing options...
Archimedes Posted March 27, 2017 Share Posted March 27, 2017 sweat rock full of tentaculites Link to comment Share on other sites More sharing options...
Jeffrey P Posted March 27, 2017 Share Posted March 27, 2017 I agree- tentaculites. They are common in New York State, especially from the Manlius Formation which is the earliest Devonian. That's a pretty nice slab. I have some posted in my Lower Devonian gallery if you want to compare. 1 Link to comment Share on other sites More sharing options...
Ludwigia Posted March 27, 2017 Share Posted March 27, 2017 Nice slab! If you get a chance to abrade it, it'll probably look even better. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
EMP Posted March 27, 2017 Share Posted March 27, 2017 Tentaculites sp., if it's Silurian I'd go with T. niagarensis, not sure what the Devonian species is. Link to comment Share on other sites More sharing options...
Kane Posted March 27, 2017 Share Posted March 27, 2017 2 minutes ago, EMP said: Tentaculites sp., if it's Silurian I'd go with T. niagarensis, not sure what the Devonian species is. I know of a few cricoconarids from the Devonian (in my area, at least): Tentaculites attenuatus (Hall) Styliolina fissurella (Hall) A close up of the image makes it more likely to be tentaculites sp. given the evidence of the growth rings (which the Styliolina do not possess). They look more like t. bellulus than t. attenuatus on account of the wider fluting (if they are Devonian). Further reading (with some very good photo plates): Hajlasz, Barbara. (1974). "Tentaculites of the Upper Silurian and Lower Devonian of Poland." Acta Palaeontologica Polonica. XIX.4 [LINK] The author also published a second good resource in 1976, but I do not have a copy on hand: Hajlasz, Barbara. (1976). "Tentaculites and their stratigraphic significance, the lower Devonian". Kwartalnik Geologiczny, 20, 273-288. 1 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
doushantuo Posted March 27, 2017 Share Posted March 27, 2017 tent Link to comment Share on other sites More sharing options...
doushantuo Posted March 27, 2017 Share Posted March 27, 2017 Bestknowtentmonog Link to comment Share on other sites More sharing options...
doushantuo Posted March 27, 2017 Share Posted March 27, 2017 lesserknown,excellent,though Link to comment Share on other sites More sharing options...
doushantuo Posted March 27, 2017 Share Posted March 27, 2017 noNOTtheStevenseagallmovie (extending the stratigraphic range of "tubular microfossils") good illos in this one ,BTW Link to comment Share on other sites More sharing options...
doushantuo Posted March 27, 2017 Share Posted March 27, 2017 I suppose anyone here has Blind/Sturmer? (purportedly showing sipho and tentacles) Link to comment Share on other sites More sharing options...
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