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Mosasaur Teeth From Ramanessin Brook Nj? (Third Tooth)


espeton

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all three of your finds are reptile teeth, but they are a little beat up to give you an exact id. id say that they are either croc or mos though.

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I agree with croc on this one

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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  • 10 months later...

I don't believe croc fossils are found in that formation, marine fossils only. You'd have to go down to south Jersey east of Camden to find croc fossils. Mososaur teeth are very common in the northern Monmouth County creataceus deposits.

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  • 7 years later...
On 1/20/2013 at 3:29 PM, lordpiney said:

That's not true Jerry... here is a Thorocasaur vert, and a Deinosuchus tooth from Monmouth county...

7eb96fcd.jpg

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That looks like a mosasaur tooth. Deinosuchus doesn't really appear in the main streams. Really nice tooth and croc vert though.

 

“You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal

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1 hour ago, The Jersey Devil said:

 

That looks like a mosasaur tooth. Deinosuchus doesn't really appear in the main streams. Really nice tooth and croc vert though.

 

 

That's been debatable for a long time... I do however agree on Mosasaur, most likely Prognathodon, until I'm proven wrong (which would be tough when you are dealing with an isolated reptile tooth). 

 

I don't know of anything diagnostic to say for sure so I default to 'most common'.

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1 hour ago, frankh8147 said:

 

That's been debatable for a long time... I do however agree on Mosasaur, most likely Prognathodon, until I'm proven wrong (which would be tough when you are dealing with an isolated reptile tooth). 


Of course the usual characteristics such as defined cutting edges and usually more elliptical base somewhat distinguish Mosasaur from Croc; however, @Plax mentioned some time back that Croc teeth are built out of many concentric layers, and I’ve seen a good diagram here:
https://www.researchgate.net/figure/Posterior-Deinosuchus-rugosus-tooth-from-the-Blufftown-Formation-locality-as-in-Figure_fig11_277955352   

 

Mosasaur teeth are solid. So I think they should be pretty distinguishable.

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“You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal

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I do see what you mean Joseph. That said, here is my example of a potential Prognathodon, which I found at Big Brook a few years back and has been debated as being Deinosuchus due to those layers.  Its a lot wider and more robust than any Mosasaur tooth I've ever found.

 

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51 minutes ago, frankh8147 said:

I do see what you mean Joseph. That said, here is my example of a potential Prognathodon, which I found at Big Brook a few years back and has been debated as being Deinosuchus due to those layers.  Its a lot wider and more robust than any Mosasaur tooth I've ever found.

 

20201020_184110~2.jpg

20201020_183612~2.jpg

20201020_183459~2.jpg


Well it is sort of layered (all reptile teeth seem to show layering of some sort), but I’d expect Deinosuchus teeth to have very fine concentric circles, especially at the base. The paleoenvironment also matches Mosasaur much better for this one

“You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal

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The eliptical depression is a mosasaur characteristic for me. When looking at the base of a croc tooth there are numerous fine round laminations.  Deinosuchus is an earlier campanian croc but guess one could be found in the Monmouth County brooks but wouldn't expect one from there. Time and environment are wrong but a resistant clast like a croc tooth could go a long way

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Oh I agree with all of this, on Mosasaur for both teeth in question, I just can't pass up a good discussion on New Jersey reptile teeth' :)

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