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Ammonites from Vallecillo, Mexico

Ramon

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Ramon Regular Member

Ramon

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Hello, I recently acquired some fossils from the Vallecillo member of the Agua Nueva formation. The Agua Nueva Lagerstätten is famous for its perfectly preserved fish and marine reptiles. It is late cenomanian in age about 90-93 million years old. I got two large ammonites from one of my trips to Mexico. I was wondering if someone can identify it to the family, and possibly the genus level. They are preserved in a finely bedded shale. 

 

 

This one one is the largest one it is about 8 inches long. 

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

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Ramon Regular Member

Ramon

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This one is smaller with a smoother shell, it is about 6 inches long

 

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

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PFOOLEY Regular Member

PFOOLEY

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An ammonite fauna is mentioned in this paper...

 

The Fossil Lagerstätte at Vallecillo, North-Eastern Mexico: Pelagic Plattenkalks related to Cenomanian-Turonian Boundary Anoxia

 

...might be of some use.

  • I found this Informative 1

"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    

 

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Ramon Regular Member

Ramon

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9 minutes ago, PFOOLEY said:

An ammonite fauna is mentioned in this paper...

 

The Fossil Lagerstätte at Vallecillo, North-Eastern Mexico: Pelagic Plattenkalks related to Cenomanian-Turonian Boundary Anoxia

 

...might be of some use.

 Thank you!!

 

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

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