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Showing results for tags 'septa'.
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Hi everyone! I just got back from a trip to Penn Dixie Fossil Park near Buffalo, New York, and found some pyritized cephalopod fossils. Penn Dixie has rocks form the Givetian of the Devonian from the Hamilton Group. A young ammonoid is easily identified as Tornoceras uniangulare, but the other orthoconic fossils are harder to ID. I am pretty sure the small but more complete one is a Bactrites, because the siphuncle appears to be almost ventral, the distance between the septa, and the slightly slanted suture (after looking at Ludwigia's). The preserved shell is very smooth and couldn't be from a Spyroceras that are also found at Penn Dixie. Similar fossils to mine are pictured on their website, unidentified. If any more pictures are needed, I will try to take them. I wanted some expert advice before concluding it is a Bactrites. Can anyone help?
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- bactritid
- cephalopod
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Ancient Ammonoids’ Complex Shell Designs May Have Aided Buoyancy Control
Oxytropidoceras posted a topic in Fossil News
Ancient Ammonoids’ Complex Shell Designs May Have Aided Buoyancy Control University of Utah, April 13, 2021 Peterman, D.J., Ritterbush, K.A., Ciampaglio, C.N. et al., 2021, Buoyancy control in ammonoid cephalopods refined complex internal shell architecture. Science Reports 11, 8055 https://doi.org/10.1038/s41598-021-87379-5 Yours, Paul H.-
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Exposed Septa of Horn Coral, Kenogami Formation, Northern Ontario
Lauren16 posted a gallery image in Member Collections
From the album: Lauren16
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- horn coral
- kenogami
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Exposed Septa of Horn Coral, Kenogami Formation, Northern Ontario
Lauren16 posted a gallery image in Member Collections
From the album: Lauren16
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- horn coral
- kenogami
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Exposed Septa of Horn Coral, Kenogami Formation, Northern Ontario
Lauren16 posted a gallery image in Member Collections
From the album: Lauren16
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- horn coral
- kenogami
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A couple of weeks ago I posted here about the working of chemical erosion on some ammonites which I had found in a furrow between 2 fields. I went back there again this week and continued along, pulling out a few more. The furrow dipped down a bit into a sort of hollow where it became obvious that the water had collected there more profusely than above over the years and the finds became more and more eroded until it reached the point where the digging was hardly worth it any more. There were however a couple of quite interesting finds which I'd like to post here. They derive from Macrocephalites ammonites, but have been eroded away to such a point that the (usually invisible) septal chambers and walls can be seen right into the center.
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- erosion
- macrocephalites
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Hello, I have a piece of what looks like a Ammonite septa fossil. I work at a thrift store in Washington State and we are trying to figure out what this is, any help would be awesome. I saw a picture on a website Wooster's Fossil of the Week and it seems to look like what I have. Here are a couple of pictures.
- 5 replies
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- ammonite
- cretaceous
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