Jump to content

Chihuahuan Ammonite Fossil


PaleoQuest

Recommended Posts

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

Link to comment
Share on other sites

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

Link to comment
Share on other sites

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,

 

    Tim    VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."
John Muir ~ ~ ~ ~   ><))))( *>  About Me      

Link to comment
Share on other sites

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, 

 

    Tim    VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."
John Muir ~ ~ ~ ~   ><))))( *>  About Me      

Link to comment
Share on other sites

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.

The human mind has the ability to believe anything is true.  -  JJ

Link to comment
Share on other sites

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

Link to comment
Share on other sites

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,

 

 

    Tim    VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."
John Muir ~ ~ ~ ~   ><))))( *>  About Me      

Link to comment
Share on other sites

You might compare with Placenticeras colquitti...

 

placenticeras.jpg

placenticeras2.jpg

placenticeras3.png

 

...from Senonian (Cretaceous) Mollusca from Trans-Pecos Texas and Northeastern Chihuahua, Mexico.

"I am glad I shall never be young without wild country to be young in. Of what avail are forty freedoms without a blank spot on the map?"  ~Aldo Leopold (1887-1948) 

 

New Mexico Museum of Natural History Bulletins    

 

point.thumb.jpg.e8c20b9cd1882c9813380ade830e1f32.jpg research.jpg.932a4c776c9696d3cf6133084c2d9a84.jpg  RPV.jpg.d17a6f3deca931bfdce34e2a5f29511d.jpg  SJB.jpg.f032e0b315b0e335acf103408a762803.jpg  butterfly.jpg.71c7cc456dfbbae76f15995f00b221ff.jpg  Htoad.jpg.3d40423ae4f226cfcc7e0aba3b331565.jpg  library.jpg.56c23fbd183a19af79384c4b8c431757.jpg  OIP.jpg.163d5efffd320f70f956e9a53f9cd7db.jpg

Link to comment
Share on other sites

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

Link to comment
Share on other sites

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. 

 

"Without fossils, no one would have ever dreamed that there were successive epochs in the formation of the earth" - Georges Cuvier

Link to comment
Share on other sites

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.  

Link to comment
Share on other sites

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.

 

"Without fossils, no one would have ever dreamed that there were successive epochs in the formation of the earth" - Georges Cuvier

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...