Ammonite species ID help requested

[srjay936]

Hey all, 

 

at the suggestion of others, I'm posting a photo of an ammonite fossil for assistance on species. This ammonite was unearthed by my father in 1972 in Shasta County CA. It measures 25 1/2 inches long by 20 inches tall. Any suggestions and help with its species and rarity is greatly appreciated. I get that it is not a complete specimen but hoping someone can help,

 

 

Shannon

Edited July 24, 2017 by srjay936
error

[ynot]

Can You post pictures of the other sides?

[Fossildude19]

And pictures of the keel would help, too.   

 

The ammonite is either Triassic, or Cretaceous, in age.  

I wonder if @Ludwigia  or @andreas might have some insight, here. 

 

[Ludwigia]

Could also be Jurassic, but I'm afraid that without any more detailed info on site and stratigraphy it would be hard to hazard a guess on this one.

[Fossildude19]

12 minutes ago, Ludwigia said:

Could also be Jurassic, but I'm afraid that without any more detailed info on site and stratigraphy it would be hard to hazard a guess on this one.

 

Hmm. I didn't see Jurassic listed for Shasta County. 

LINK

[Wrangellian]

Given the size and general location I would guess something like Puzosia/Parapuzosia (Cretaceous: Turonian, my reference says). I hope you have a more specific location than 'Shasta Co', though you don't have to reveal it to the world here.

[andreas]

Got no Triassic vibes because of preservation and matrix. My guess is Cretaceous.

[PFOOLEY]

UPPER CRETACEOUS OF THE PACIFIC COAST

[Ludwigia]

6 hours ago, Fossildude19 said:

 

Hmm. I didn't see Jurassic listed for Shasta County. 

LINK

 

Ok. I'm not at all familiar with the gelogy there, which is why I was asking for more details. I'd now agree with the others in tending toward the cretaceous, but that still leaves a lot open.

[andreas]

1 hour ago, PFOOLEY said:

UPPER CRETACEOUS OF THE PACIFIC COAST

P la t e 16.— Figure, 1, 1a, 2. Puzosia (Austiniceras) giganteum n. sp. could maybe be a good guess.

[PFOOLEY]

1 hour ago, andreas said:

P la t e 16.— Figure, 1, 1a, 2. Puzosia (Austiniceras) giganteum n. sp. could maybe be a good guess.

 

[andreas]

Thank you Mike for posting the plate. Just realised my link leads to the complete work not to the plate.

Additionally to the plate here is the plate description.

 

 

Figure Page 1, la, 2. Puzosia (Austiniceras) giganteum n. sp. Holotype and hypotype (C. A. S. Type Coll.). (1, la) Holotype. Greater diameter, 446 mm (17.5 inches) ; width of umbilicus, 146 mm; breadth of whorl, 132 mm. Locality 2245 (C. A. S.), found on Dry Creek, west of Rosewood, western Tehama County. (2) Hypotype. Found in long gulch, 1 mile north of middle fork of Cottonwood Creek, Shasta County, near horizon of Vascoceras shastense (Anderson) ; Turonian..

 

@Shannon: Specimen 2 was found in Shasta County.

Please keep in mind that iding with pics is not more than just a good guess.

 

regards

Andreas

[ynot]

5 minutes ago, andreas said:

@Shannon: Specimen 2 was found in Shasta County.

Please keep in mind that iding with pics is not more than just a good guess.

Hey andreas,

In order to send a tag to a member You have to select from the dropdown menu, and the tag should be hichlighted when done correctly....

@shannon

[andreas]

@ynot Thank you! Good to know.

But now I'm afraid that a user with name Shannon got the alert. The original post comes from user @srjay936 His first name is Shannon.

kind regards

Andreas

[Wrangellian]

There you go, that's the publication I referred to, Plate 16 could work but I was looking at Plate 5 initially. I have the hard copy of that book!

[ynot]

4 hours ago, andreas said:

 

But now I'm afraid that a user with name Shannon got the alert. The original post comes from user @srjay936 His first name is Shannon.

kind regards

Andreas

OH well they will figure it out.

 

Or maybe not for @shannon, has not posted or been online since joining over a year ago.

[srjay936]

Hey all,

 

just checked the site and found a bunch of your responses that were not forwarded to my email. My very first post had email alerts but not this thread. Not sure what happened by thank you for the replies. I will phone and ask my dad exactly where he found the fossil and hope that helps with ID. Much of what you are saying is way out of my wheelhouse. But It looks like you all are first narrowing which period it came from then species? Is this correct. 

 

Shannon

srjay936

[srjay936]

Wish that I could send pics of other aspects of the specimen but it is encased in plaster, which was painted over. It will be quite an undertaking to get if free of the man made matrix but I will start the project sooner than later. As I first mentioned, I wanted to know its value. You all told me you didn't do appraisals on this site but made some great recommendations to post pics and attempt to ID species first then look elsewhere to determine its collectibility and value. Thanks again

Shannon

srjay936

 

[srjay936]

Hey all, 

 

still trying to get some help with my ammonite ID. My father told me it came from "Little Cow Creek" in the town of Bella Vista, Shasta County. It was unearthed from the creek bank in what a Berkeley Paleo doc told him was "mudstone", not Sandstone. Hope this helps in finding the mystery of this species. Thanks, 

SRJ

[PFOOLEY]

8 hours ago, srjay936 said:

still trying to get some help with my ammonite ID...

 

Based on the geology in the area...

 

 

...of the locality information...

 

8 hours ago, srjay936 said:

...My father told me it came from "Little Cow Creek" in the town of Bella Vista, Shasta County. It was unearthed from the creek bank...

 

...I believe that @andreas was correct...I would call your ammonite, Puzosia (Austiniceras) sp.