CSimpson176 Posted February 17, 2019 Share Posted February 17, 2019 Found this while searching the creeks located around my farm. I find a lot of bryozoans, brachiopods, crinoid stems and that’s about it. Never have found a fossil like this around here before, though I know Northern Kentucky has found orthocone fossils before. Interested in what you all think! Link to comment Share on other sites More sharing options...
CSimpson176 Posted February 17, 2019 Author Share Posted February 17, 2019 Link to comment Share on other sites More sharing options...
Fossildude19 Posted February 17, 2019 Share Posted February 17, 2019 Can we see pictures of the ends? Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
CSimpson176 Posted February 17, 2019 Author Share Posted February 17, 2019 Of course! I wetted it down as it helps allow to see that the segments all are a part of one piece. Link to comment Share on other sites More sharing options...
Rockwood Posted February 17, 2019 Share Posted February 17, 2019 It's not real clear, but I think the internal shapes look more like septa than lumen cast to me so I would say yes, nautiloid orthocone. 3 Link to comment Share on other sites More sharing options...
CSimpson176 Posted February 17, 2019 Author Share Posted February 17, 2019 Thanks @Rockwood! Could you explain the difference between septa and lumen? Link to comment Share on other sites More sharing options...
Rockwood Posted February 17, 2019 Share Posted February 17, 2019 29 minutes ago, CSimpson176 said: Thanks @Rockwood! Could you explain the difference between septa and lumen? The pizza wheel here is a lumen cast in a crinoid stem section. It's just one example, but notice the plate shape. The voids are where the columnals have dissolved away. Nautiloid septa are usually more curved (bowl shaped) and appear more as deviders between the chambers (camerae). The shape that is somewhat recessed just above and left of center in the third photo down I think may be the curve (septal neck) where a septa meets the siphuncle. 3 Link to comment Share on other sites More sharing options...
Rockwood Posted February 17, 2019 Share Posted February 17, 2019 Here is a similar preservation of a nautiloid with a cast of the siphuncle and septa. The septa do not have recurved necks in this example though. 2 Link to comment Share on other sites More sharing options...
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