Ammonites - Old Toll Bridge Road, Unnamed Creek, Cooke Co., TX

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

In Cooke Co. along the Old Toll Bridge Road, there is an unnamed creek, we found an abundance of Mortoniceras ranging in size from an inch to 15 inches in diameter.  This formation is most likely a mix of formations including the  Fort Worth Limestone formation (c. 101 mya), but containing other formations as well. They are from the Washita Group so they are all Lower Cretaceous.

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Mortoniceras #601

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #601

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #605

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #601

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #607z

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #601

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #617

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #618b

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #618

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #708b

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #708

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #714

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #715

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #719b

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #719c

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras in situ

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #761

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #761b w/siphuncle

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #762

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #763

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #764b

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #764

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #765

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #765c

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #767b

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #767

Fort Worth Limestone Formation

Cooke Co., TX

Three Mortoniceras #773

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras #774

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras 

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras 

Fort Worth Limestone Formation

Cooke Co., TX

Mortoniceras in situ

Fort Worth Limestone Formation

Cooke Co., TX