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Showing results for tags 'pico formation'.
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This one comes from Upper Pliocene Pico Formation (So Cal in Newhall) of a shallow marine area that, normally, is mainly gastropods and bivalves type fossils, rarely turtles. I was cleaning some up for the local elementary schools to use but this one has some structure to it that has me wondering if it is possible soft tissue. It is unlike the usual concretions I see in either marine or terrestrial. It looks remarkably like tissue which I can’t capture with picture, especially the microstructure which, again, looks like tissue. It is certainly not fossilized osseous tissue (we’ve pulled out and donated ample of that). There is a mammalian tooth, not pinniped, that I haven’t fully worked out (still deciding about leaving it) but it is just outside of this area in silt/mud cementation around this and yet to be determined if critter lost a single tooth or if more is to be found. There is also a triangular imprint (I think) that I am leaving alone for now. Ideas?
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- pico formation
- soft tissue fossil
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I recently picked up three cow shark teeth with uncertain identifications. I can not be sure myself so I thought I’d get some help sorting this out. First one is 19mm and comes from the Pico Formation, Ventura County California. I believe it is Pliocene in age. I think it is a Hexanchus tooth but Notorynchus is known from at least one So Cal formation similar in age according to fossilworks. It is missing the largest cone. Even though I lean 6 Gill, I’m almost hoping somebody thinks 7 Gill because a California 7 Gill would be sweet lol Either way, it’s a really pretty tooth. Next are two from the Miocene deposits of Gironde France. Notorynchus and Hexanchus are both described from this location and they are small partials. I really can not figure out if I have two Notorynchus or one of each. I’m rooting for a 6 Gill but a great location to add regardless of the ID. All opinions are welcome.
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- cow shark
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