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PaleoQuest

Chihuahuan Ammonite Fossil

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PaleoQuest

This piece arrived by way of Copper Canyon in Chihuahua, Mexico. Its owner is inquiring if it's an authentic piece and the best way it could get appraised. 

 

IMG_0033.JPG

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PaleoQuest

This piece was located in the Copper Canyon in the state of Chihuahua, Mexico and we needed help in properly identifying it.IMG_0024.JPGs

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Fossildude19

Sorry, but we don't do appraisals here, per the Forum Rules and Community Standards

 

"Please understand that The Fossil Forum cannot appraise the commercial value of a fossil; this is beyond what can be done through pictures on the internet, so please don't ask."

 

Your best bet is to get it identified  (I do believe it is real) and then check the internet auction sites for what similar sized/condition fossils are going for.

Unfortunately, I cannot see the sutures, ... so, ID may be difficult to identify. 

That also means the preservation isn't excellent. 

Regards,

 

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PaleoQuest

Thank you Tim for the solid advice.

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Fossildude19

Probably a few more views, ... top, sides, bottom etc. with something in the picture for scale (ruler, tape measure) would be helpful to coming to an accurate ID. ;) 

Any idea of the age of the rocks where it was from?

Regards, 

 

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JohnJ
9 minutes ago, PaleoQuest said:

Thank you Tim for the solid advice.

 

I merged both your topics on this ammonite.  Responses about the same fossil are less confusing when retained in a single topic.  ;)

 

You can add photos using the Reply box below. 

 

Welcome to TFF.

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PaleoQuest

To answer Tim's rock age question. We really don't have an exact idea except that Copper Canyon region is located in Sierra Madre Occidental major mountain range in Northwestern Mexico and part of the North American Cordillera. According to Wikipedia, "some of this area has a series of Paleozoic sedimentary sequences from a deep marine environment underlying it". 

 

I took the liberty to include another photo with a tape measure included.

 

IMG_0025.JPG

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Fossildude19

These are the views we need to see: 

 

    01f02.jpg

 

 

If the area has paleozoic fossils, then it is more likely a nautiloid or goniatite, rather than an ammonite. 

Regards,

 

 

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FossilDAWG

I was also thinking of Placenticeras syrtale, but there are some look-alikes so it would be important to know the location and age.  It would help to be able to see the suture lines.

 

There are no Paleozoic fossils that resemble the photos.

 

I know it will never happen, but I do wish people would just refuse to purchase specimens that lack good provenance (locality and geological formation) data.  Many (most?) dealers will not pay attention to providing this information until they are forced to, although the best ones do already.  A fossil without proper provenance data is just an ornament, stripped of any scientific value.

 

Don

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Ramon

Northern Mexico is mostly Late Cretaceous in age. I doubt it is from the paleozoic era. It looks more ammonite ish to me than goniatite or other nautiloid. 

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PaleoQuest

The owner of this fossil just got back to me with some new information which is different from what was shared initially (my sincerest apologies). It appears this piece was found outside of Ojinaga near Rio Conchos tributary to the Rio Grande. As far as the type of rock where it was located, he didn't know but did share that there are several fossilized tree trunks located in the same area in the strata.

 

Data collection continues, but I thought I'd pass along the correction.  

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Ramon
44 minutes ago, PaleoQuest said:

The owner of this fossil just got back to me with some new information which is different from what was shared initially (my sincerest apologies). It appears this piece was found outside of Ojinaga near Rio Conchos tributary to the Rio Grande. As far as the type of rock where it was located, he didn't know but did share that there are several fossilized tree trunks located in the same area in the strata.

 

Data collection continues, but I thought I'd pass along the correction.  

 

Yeah, see late creataceous!!! There's the javelina and Ojinaga formations. They are from the campanian and Maastrichtian or about 75-65 million years ago.

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