Brachiopods - Jacksboro, Jack Co., TX

Kingdom: Animalia, Phylum: Brachiopoda, Class: Rhynchonellata, Order: Rhynchonellida, Family: Wellerellidae 

Kingdom: Animalia, Phylum: Brachiopoda, Class: Strophomenata, Order: Productida, Family: Rugosochonetidae, Productellidae, Echinoconchidae

Kingdom: Animalia, Phylum: Brachiopoda, Class: Rhynchonellata, Order: Athyridida, Family: Athyrididae, Neoretzidae

Kingdom: Animalia, Phylum: Brachiopoda, Class: Rhynchonellata, Order: Spiriferida, Family: Elythidae

Kingdom: Animalia, Phylum: Brachiopoda, Class: Strophomenata, Order: Orthotetida, Family: Derbylidae

 

This Pennsylvanian Formation from 300 million years ago contains many types of brachiopods.  Brachiopods are marine invertibrates that are hinged, but are typically not symmetrical, having an upper and lower shell connected by a hinge.  This formation in Jacksboro is exposed as a result of building the Lost Creek Dam.  When the dam was built, the excavation needed to build the dam resulted in a cut that now has ravines that wash out when it rains.  The resulting exposure is filled with marine fossils including the brachiopods shown below. Measurements are in centimeters.

Click on images to enlarge.

Composita Ovata #263

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania nebrascensis #255

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hustedia mormoni #275

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hustedia mormoni #275b

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hustedia mormoni #275c

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Rhipidomella #357

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita Ovata 430b

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hudstedia mormoni #275c

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Rhipidomella #358

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Crurithyris planoconvexa #431

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Pulchratia sp. #254

Paluxy Sand Formation

Hood Co., TX

Enteletes #359

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Crurithyris planoconvexa #431b

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Retaria lassallensis #217

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita Ovata #430

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Punctospirifer #432 Finis Shale, Graham Formation Jacksboro, Jack Co., TX

Punctospirifer #432

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania sp. #433

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Allorisma terminale. #434

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita ovata #559b

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania sp. (reverse) #433b

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania nebrascensis #435

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita ovata #559c

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania sp. #433c

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania nebrascensis #435b

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Myalina #560

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Chonetinella verneuilana #433d

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita ovata #559

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania nebrascensis #569

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania nebrascensis #569

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania nebrascensis #569

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania nebrascensis #569

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Punctospifera #569

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Linoproductus cora #974a

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Linoproductus cora #974b

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita ovata #975b

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita ovata #975b

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita ovata #975c

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita ovata #975d

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita ovata #975e

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita ovata #975f

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Punctospifer sp. #975j

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Punctospifer sp. #975k

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Punctospifer sp. #975l

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Punctospifer sp. #975m

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania nebrascensis #978a

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Juresania nebrascensis #978b

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Antiquatonia portlockiana #978

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Antiquatonia portlockiana #978z

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hystriculina texana #978c

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

 

Hystriculina texana #978d

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hystriculina texana #978e

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hystriculina texana #978f

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Retaria lassallensis #978

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Retaria lassallensis #978

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hystriculina texana #978m

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hystriculina texana #978n

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Retaria lassallensis #978

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Retaria lassallensis #978

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Retaria lassallensis #978

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Retaria lassallensis #978

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hystriculina texana #984a

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hystriculina texana #984b

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Cleiothyridina orbicularis #984c

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Cleiothyridina orbicularis #984d

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita ovata #984e

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Composita ovata #984f

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Antiquatonia portlockiana  #984j

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Antiquatonia portlockiana #984k

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hystriculina texana #984m

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Neochonetes granulifer #984

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Hystriculina texana #984n

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Rhipidomella  carbonaria #984p

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX

Rhipidomella carbonaria #984r

Finis Shale, Graham Formation

Jacksboro, Jack Co., TX