Ammonite? Lobster tail? (Big Brook, NJ)

[TRexEliot]

Found several years ago in Big Brook, NJ.  Any help IDing would be greatly appreciated! Thanks in advance.

 

Hope it isn't considered rude to call people into a post this way, but going to call on @Trevor for his opinion.

[Tidgy's Dad]

It appears to be a rather lovely nautiloid. 

[Fossildude19]

Very nice nautilus!  

 

@Carl  @frankh8147 @Jeffrey P

[TRexEliot]

@Fossildude19 @Tidgy's Dad thanks so much guys! Really appreciate all the help I've gotten here.

[historianmichael]

Awesome nautiloid. I haven't seen any of them come out of Big Brook before. Great find! My guess is Eutrephoceras sp.

[Al Dente]

Eutrephoceras. Are you certain this is from Big Brook? No reason they can't be found there. The preservation is much better than any cephalopod that I've seen from the area.

[TRexEliot]

10 minutes ago, Al Dente said:

Eutrephoceras. Are you certain this is from Big Brook? No reason they can't be found there. The preservation is much better than any cephalopod that I've seen from the area.

Quite sure! I panned it out myself from behind a fallen tree on the upstream side of big brook preserve. Found the baculite fossil that @Fossildude19 IDed for me just a minute ago in another thread on the same trip in the same hole.

[frankh8147]

Yep - nautiloid it is! I recently saw a friend pull one of them out too but they are RARE!

[Al Dente]

2 hours ago, TRexEliot said:

Quite sure! I panned it out myself from behind a fallen tree on the upstream side of big brook preserve. Found the baculite fossil that @Fossildude19 IDed for me just a minute ago in another thread on the same trip in the same hole.

 

Nice find.

[Carl]

4 hours ago, Fossildude19 said:

Very nice nautilus!  

 

@Carl  @frankh8147 @Jeffrey P

I agree with Eutrephoceras. Quite rare. An excellent find. I have only found one in 33 years and it is very inferior in comparison.

[Jeffrey P]

Truly awesome find! Big congratulations. Any identifiable cephalopod, especially a nautilus is rare in Big Brook, but a complete one like that is spectacularly rare. Erosion and stream wear and tear usually breaks those down into fragments long before we ever encounter them. Thanks for sharing.