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Showing results for tags 'paleocene'.
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From the album: Aquia Formation
These teeth are generally identified as Cretalamna appendiculata but should probably be Cretalamna sp.© bthemoose
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From the album: Aquia Formation
These teeth are generally identified as Cretalamna appendiculata but should probably be Cretalamna sp.© bthemoose
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- aquia formation
- charles county
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(and 6 more)
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From the album: Aquia Formation
These teeth are generally identified as Cretalamna appendiculata but should probably be Cretalamna sp.© bthemoose
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- aquia formation
- charles county
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(and 6 more)
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- aquia formation
- charles county
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From the album: Aquia Formation
© bthemoose
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- aquia formation
- charles county
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From the album: Aquia Formation
Some serration and tip damage but this is a really nice and huge Palaeocarcharodon (measures 34.2 mm on the slant) for the formation© bthemoose
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- aquia formation
- charles county
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From the album: Aquia Formation
Extreme posterior tooth and the smallest Otodus I've found© bthemoose
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- aquia formation
- charles county
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- aquia formation
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From the album: Aquia Formation
A big chunky tooth that measures 48.6 mm on the slant and is the largest Otodus I've found© bthemoose
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- aquia formation
- charles county
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From the album: Aquia Formation
© bthemoose
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- aquia formation
- charles county
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(and 6 more)
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From the album: Aquia Formation
© bthemoose
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- aquia formation
- charles county
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(and 6 more)
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From the album: Aquia Formation
© bthemoose
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- aquia formation
- charles county
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(and 6 more)
Tagged with:
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From the album: Aquia Formation
© bthemoose
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- aquia formation
- charles county
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(and 6 more)
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- aquia formation
- charles county
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(and 6 more)
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- aquia formation
- charles county
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- aquia formation
- charles county
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From the album: Aquia Formation
© bthemoose
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To pass some time I've been recently researching early Paleocene life and I keep coming back to researching (in my view) the two strangest and controversial Late Cretaceous-Early Paleocene Formations I know of. These are the Hornerstown Formation dating 66.5-65.5 Million Years ago in what is now New Jersey, U.S. And the Takatika Grit Formation dating 66.5-60.0 Million Years ago in what is now the Chatham Islands, New Zealand. https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=0b3baee9ab1afc7973337f5047495b723fcfa4f2 https://www.researchgate.net/publication/315461615_The_age_of_the_Takatika_Grit_Chatham_Islands_New_Zealand https://www.sciencedirect.com/science/article/abs/pii/S0195667109000184?via%3Dihub I've read many reports about these formations and the pretty controversial stuff that's been found in both these areas (Paleocene ammonites and reports of archaic marine reptiles like Paleocene Mosasaurs). I'm really not 100% sure what to make of this as I've heard conflicting hypotheses on whether these more archaic marine reptile fossils were reworked from older formations while others say it's not too too likely? https://www.cambridge.org/core/journals/journal-of-paleontology/article/abs/maastrichtian-ammonites-from-the-hornerstown-formation-in-new-jersey/4F051D07668B7B893EEFECF0506E2F1B https://bioone.org/journals/acta-palaeontologica-polonica/volume-57/issue-4/app.2011.0068/Short-Term-Survival-of-Ammonites-in-New-Jersey-After-the/10.4202/app.2011.0068.full For most of these "controversial" specimens, I would say reworking is likely while some I'll admit I'm not sure? For the Mosasaurs, it's clear that the astroid impact 66 Million Years ago caused their total extinction, but I'm still not 100% convinced that none emerged from the event alive (at least barely) and swam the seas in the very first days of the Danian Paleocene but not too long after. Unlike the mostly terrestrial Non-Avian Dinosaurs, which could only hide in so many places and it's very unlike more than a tiny amount of individuals (not enough to support a population) made it into the Paleocene, the Oceans have slightly more areas to hide and more even for endothermic air breathing animals like Mosasaurs (though as an endotherm, food does become a major issue especially when the ocean food chain nearly collapsed completely). What I'm wondering is how valid are at least "some" of these supposed archaic marine reptile and ammonite fossils from the earliest Paleocene sections of the Hornerstown Formation and the Takatika Grit? Also, of all the Maastrichtian Mosasaurs known so far, which ones would have been the mostly likely to have (at least briefly) survived the Cretaceous-Paleocene Extinction Event of 66 Million Years ago (would it have been generalist feeders, ones that specialized in deep sea hunting, ones with cosmopolitan distributions, ones small by mosasaur standards but still around the same size of the few confirmed large reptiles that survived the event like the 8 meter (26 feet) in length Thoracosaurus, or ones with all these traits and advantages)?
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- ammonites
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- danian
- halisaurus
- hornerstown formation
- maastrichian
- marine reptile bone
- marine reptiles
- meirs farm site
- mosasaurs
- mosasaurus
- new jersey
- new jersey fossils
- new zealand
- new zealand fossils
- paleocene
- paleocene ammonites
- paleocene oceans
- takatika grit
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Questions about Paleocene records of the Bird Asteriornis
Joseph Fossil posted a topic in General Fossil Discussion
I'm researching bird fauna from the Danian Paleocene era recently and I have some questions about a particular bird, Asteriornis maastrichtensis. It was discovered in late 2019 in Maastrictian deposits of the Maastricht Formation, Cretaceous dating 66.8-66.7 Million Years ago in what is now Belgium and was pretty small in size, about the size of a small duck and weighed only 394 grams when alive. https://www.nature.com/articles/s41586-020-2096-0 Asteriornis is the earliest confirmed Neognathae (a group of birds of which the majority of birds alive today belong to) and it's oldest remains date to just around One Million Years before the Cretaceous-Paleocene Astroid impact wiped out that last of the non-avian dinosaurs. I've seen a lot of people say that this bird species survived the Cretaceous-Paleocene Extinction event into the Paleocene. It's small size and diet of seeds make it a good candidate to have survived the event, but I haven't found any definitive records yet of Asteriornis from the early Paleocene. What I'm wondering is did Asteriornis survive the Cretaceous-Paleocene Mass Extinction Event 66 Million Years ago and are there any records of Asteriornis that date definitively to the Paleocene era?- 6 replies
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Hello, I found what appears to be well preserved casts of clams and sea snails and also a possible bone or coral fragment but I’m not sure what most of them are except for the sea snails which I think is Turritella sp. But I’m not sure exactly. I’m not sure exactly what formation it is either but I do know it’s most likely the Ripley formation, Providence sand formation, Clayton formation, or Nanafalia formations. So I was wondering if someone could help me identify what species these belonged to and maybe even what period there from, thanks in advance.
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- cretaceous?
- paleocene
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Paleocene Starfish Ossicles from the Vincentown Formation, N.J.
Jeffrey P posted a gallery image in Member Collections
From the album: Tertiary
Goniaster mammilata Starfish Ossicles 1/4 inch Paleocene Vincentown Formation Rancocas Creek Vincentown, N.J. A gift from HistorianMichael- 1 comment
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Paleocene Regular Echinoid from the Vincentown Formation, N.J. IMG_9382
Jeffrey P posted a gallery image in Member Collections
From the album: Tertiary
Selenia tumidula Salenioid Echinoid (Regular) 1/2 inch across Paleocene Vincentown Formation Rancocas Creek Vincentown, N.J.-
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Hello! Drove down from Jersey and a good day at Douglas Point this past Sunday. Over 150 teeth in all, two nice- yet worn- Otodus teeth and a Paleocarcharodon orientalis. I also found this, and I don't know what it is. Maybe it's nothing. Photos are taken on a cutting board with a 1" grid.
- 17 replies
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- douglas point
- paleocene
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Hello, I found an oyster layer situated below a terrace overlooking the Colorado river in Travis county, Texas. I became curious about the ID after reading about the ostrea fossils found nearby. May be some more recent eastern oysters left over from others. There were plenty of these oysters embedded in reddish clay. Any help with this appreciated!
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- cretaceous
- ostrea
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Paleocene Eagle Ray Barb from Douglas Point, MD.
Jeffrey P posted a gallery image in Member Collections
From the album: Tertiary
Undescribed Myliobatoid Eagle Ray Barb 3/4 inches long Paleocene Aquia Formation Douglas Point Charles CO., MD. A gift from historianmichael. Thanks Mike.-
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