Ammonites - Lake Texoma, TX

Kingdom: Animalia, Phylum: Mollusca, Class: Cephalopoda, Subclass: Ammonoidea, Order: Ammonitida

In Grayson Co., we find Mortoniceras ammonites and other ammonites not pictured around the dam area of Lake Texoma. These ammonites are quite large and are an inch to three inches thick. The siphuncle is commonly seen running along the top ridge of the fossil as shown in the examples below. 

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Mortoniceras #347

Duck Creek Formation

Grayson Co., TX

Mortoniceras #347 Top

Duck Creek Formation

Grayson Co., TX

Mortoniceras #358

Duck Creek Formation

Grayson Co., TX

Mortoniceras #349

Duck Creek Formation

Grayson Co., TX

Mortoniceras #349

Duck Creek Formation 

Grayson Co., TX

Mortoniceras #350

Duck Creek Formation 

Grayson Co., TX

Mortoniceras #351

Duck Creek Formation 

Grayson Co., TX

 

Mortoniceras #352

Duck Creek Formation 

Grayson Co., TX

Mortoniceras #353

Duck Creek Formation 

Grayson Co., TX