Crinoids from Jacksboro,  Jack Co., TX

Kingdom: Animalia, Phylum: Echinodermata, Class: Crinoidea, 

In Jack Co., TX near Jacksboro, we found a large straight cephalopod Pseudorthoceras. In addition, we found several Gonioloboceras, showing their typical suture patterns, and several other ammonoids and nautiloids including Tainoceras, Metacoceras, and the straight Euloxoceras Greeni. We also found many Rugobactrites similar to the one shown below. These specimens are from the Pennsylvanian, Graham (Finis shale) formation (c. 300mya).

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Jack County, TX 

Crinoid with Bryzoa #261

Graham (Finis Shale)

Jacksboro, Jack Co., TX

Crinoid Stems #262

Graham (Finis Shale)

Jacksboro, Jack Co., TX

Floricyclus #262

Graham (Finis Shale)

Jacksboro, Jack Co., TX

Crinoid #262c

Graham (Finis Shale)

Jacksboro, Jack Co., TX

Crinoid #214

Graham (Finis Shale)

Jacksboro, Jack Co., TX

Crinoid #158

Graham (Finis Shale)

Jacksboro, Jack Co., TX

7 inch Crinoid Stem #442

Graham (Finis Shale)

Jacksboro, Jack Co., TX

Crinoid Stems #443

Graham (Finis Shale)

Jacksboro, Jack Co., TX

Crinoid Anal Spine #447

Graham (Finis Shale)

Jacksboro, Jack Co., TX

Crinoid Cups #448

Graham (Finis Shale)

Jacksboro, Jack Co., TX

Conostichus (Jellyfish home) #588

Graham (Finis Shale)

Jacksboro, Jack Co., TX

Conostichus (Jellyfish home) #588b

Graham (Finis Shale)

Jacksboro, Jack Co., TX

Crinoid Disc #985a Grahma (Finis Shale) Jacksboro, Jack Co., TX

Crinoid Disc #985a

Grahma (Finis Shale)

Jacksboro, Jack Co., TX

Crinoid Disc #985b

Grahma (Finis Shale)

Jacksboro, Jack Co., TX

Crinoid Disc #985c

Grahma (Finis Shale)

Jacksboro, Jack Co., TX

Crinoid in Matrix #994a

Grahma (Finis Shale)

Jacksboro, Jack Co., TX