Clams, Oysters, and Scallops - Hood Co., TX

Kingdom: Animalia, Phylum: Mollusca, Class: Bivalvia, Order: Ostreoida, Families: Pectinidae (scallops, pectens), Inoceramidae (clams), Gryphaeidae (oysters)

There is a layer or formation consisting of oyster fossils at the base of Comanche Peak on our property. These fossils are commonly called Devils Toenails, are from the Gryphaeidae family, and are a genus of extinct oysters. In addition, there are many Ceratostreon texanum, an oyster with a shell about 3 inches long. On our property this layer is from the Cretaceous period, and represent oysters that lived in the shallow sea waters of what is now the Gulf of Mexico about 90 million years ago. We have found complete specimens as shown below, and both the articulated valves, and the 'lids' of the oysters. Their shells are very thick, and grow in bands. The oyster beds are very prominent, with large areas of oysters making up a layer several inches thick. In the same area are Neithia (scallop) shells, and clams from very small to the size of the palm of your hand. At higher elevations on Comanche Peak, we have found deer heart clams, as well as rudists. 

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Hood County, TX 

Clam with Pedicle #177

Comanche Peak Formation

Hood Co., TX

Protocardia  #177

Comanche Peak Formation

Hood Co., TX

Deer Heart Clam

Comanche Peak Formation

Hood Co., TX

Ganocardium #288

Comanche Peak Formation

Hood Co., TX

Procardia #310

Comanche Peak Formation

Hood Co., TX

Cyprimeria texana

Comanche Peak Formation

Hood Co., TX

Tapes in Matrix #7

Paluxy Sand Formation

Hood Co., TX

Trigonia

Comanche Peak Formation

Hood Co., TX

Protocardia #3

Comanche Peak Formation

Hood Co., TX

Leptosolen fragment #5

Comanche Peak Formation

Hood Co., TX

Cyprimeria texana #4

Comanche Peak Formation

Hood Co., TX

Neithia

Comanche Peak Formation

Hood Co., TX

Gyrostrea #109

Comanche Peak Formation

Hood Co., TX

Leptosolen #108

Comanche Peak Formation

Hood Co., TX

Procardia #102

Comanche Peak Formation

Hood Co.,  TX

Protocardia #118

Comanche Peak Formation

Hood Co., TX

Clam in Matrix #120

Comanche Peak Formation

Hood Co., TX

Leptosolen #127

Comanche Peak Formation

Hood Co., TX

Rudist #144 Comanche Peak Formation Hood Co., TX

Rudist #144

Comanche Peak Formation

Hood Co., TX

Lima wacoensis #153 Comanche Peak Formation Hood Co., TX

Lima wacoensis #153

Comanche Peak Formation

Hood Co., TX

Neithia #115

Comanche Peak Formation

Hood Co., TX

Protocardia #169 Comanche Peak Formation Hood Co., TX

Protocardia #169

Comanche Peak Formation

Hood Co., TX

Rudist #144

Comanche Peak Formation

Hood Co., TX

Pecten irregularis #161 Comanche Peak Formation Hood Co., TX

Pecten irregularis #161

Comanche Peak Formation

Hood Co., TX

Pterotrigonia #242

Comanche Peak Formation

Hood Co., TX

Procardia #243

Comanche Peak Formation

Hood Co., TX

Procardia #243

Comanche Peak Formation

Hood Co., TX

Neithia #247

Comanche Peak Formation

Hood Co., TX

Lima wacoensis and Pectan sp. #247

Comanche Peak Formation

Hood Co., TX

Neithia #245

Comanche Peak Formation

Hood Co., TX

Artica "Deer Heart" Clam #249

Comanche Peak Formation

Hood Co., TX

Trigonia Imprint #250

Comanche Peak Formation

Hood Co., TX

Gryphaea (Devils Toenail) #10

Walnut Clay Formation

Hood Co., TX

Exogyra texana #10b

Walnut Clay Formation

Hood Co., TX

Exogyra #10c

Walnut Clay Formation

Hood Co., TX

10d Ceratostreon texanum

Walnut Clay Formation

Hood Co., TX

Oyster with soft tissue inside #166

Walnut Clay Formation

Hood Co., TX

 

Oyster with soft tissue cast inside #166b

Walnut Clay Formation

Hood Co., TX

Peilinia crenulimargo #173

Walnut Clay Formation

Hood Co., TX

Peilinia Reverse #173b

Walnut Clay Formation

Hood Co., TX

Oyster Bed #10

Walnut Clay Formation

Hood County, TX

Rudist #10

Walnut Clay Formation

Hood Co., TX

Rudist #10b

Walnut Clay Formation

Hood Co., TX

Neithia #361

Walnut Clay Formation

Hood Co., TX

Oyster #388

Walnut Clay Formation

Hood Co., TX

Lima wacoensis #361b

Walnut Clay Formation

Hood Co., TX

Pelinia crenulimargo #421

Goodland Formation

Hood Co., TX

Oyster Bed #410

Walnut Clay Formation

Hood Co., TX

Pinna Comanchean #892b Walnut Clay Formation Granbury, Hood Co., TX

Pinna Comanchean #892b

Walnut Clay Formation

Granbury, Hood Co., TX

Pinna Comanchean #892

Walnut Clay Formation

Granbury, Hood Co., TX

Pinna Comanchean #892c Walnut Clay Formation Granbury, Hood Co., TX

Pinna Comanchean #892c

Walnut Clay Formation

Granbury, Hood Co., TX

Neithia sp. #868

Walnut Clay Formation

Granbury, Hood Co., TX

Pinna Comanchean #892d Walnut Clay Formation Granbury, Hood Co., TX

Pinna Comanchean #892d

Walnut Clay Formation

Granbury, Hood Co., TX

Neithia #868b

Walnut Clay Formation

Granbury, Hood Co., TX

Pinna Comanchean #892e Walnut Clay Formation Granbury, Hood Co., TX

Pinna Comanchean #892e

Walnut Clay Formation

Granbury, Hood Co., TX

Artica #885

Walnut Clay Formation

Granbury, Hood Co., TX