Fossil Find: Fort Worth Site

Over 110 million years ago the Lower Cretaceous Fort Worth, Tarrant County, Texas was a shallow sea bottomed with lime muds. This environment produced the limestone we see there today. Limestone rich in marine invertebrate life such as ammonites, snails, urchins and clams.  

Kingdom: Animalia – Phylum: Mollusca – Class: Bivalve (clams and oysters)

Bivalve Pectin

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Bivalve Pectin Neithia

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Bivalve Lima

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Bivalve Gryphaea¬†“Devil’s Toenail”

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Bivalve Anoma (internal cast)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Bivalve Nucula (internal cast)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Bivalve Cyprimeria texana (internal cast)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Bivalve Oyster Texigryaea

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Bivalve Leptosolen (internal cast)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Bivalve (imprint)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Kingdom: Animailia – Phylum: Mollucsa – Class: Gastropoda (snails)

Snail Tylostoma (internal cast)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Snail Tylostoma (internal cast)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Snail uprepped (internal cast)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Kingdom: Animalia – Phylum: Mollusca – Class: Cephalopoda (squid and octopi)

Ammonite Mortoniceras 

(complete internal cast)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Ammonite Oxytropidoceras  

(internal cast segment)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Ammonite Mortoniceras 

(internal cast segment)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Kingdom: Animalia – Phylum: Echinodermata – Class: Echinoidea (sea urchins)

Sea Urchin Heteraster texanus

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Sea Urchin Coenholectypus (Raw)

Lower Cretaceous

Fort Worth, Tarrant County, Texas

Sea Urchin Phynosoma texana

Lower Cretaceous

Fort Worth, Tarrant County, Texas

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