Fossil Finds: Jacksboro Spillway (Finis Shale)
Fossil collectors and researchers alike repeatedly visit this site just northeast of the Texas town of Jacksboro. Similar to the age of Minerals Wells Fossil Park, we again see an ecology that predates the dinosaurs. Pennsylvanian (Upper Carboniferous) Finis Shale, Graham Formation, Jacksboro, Jack County, Texas. Below is a short video about the site as well as a few of the fossil I have found there:
Kingdom: Animalia – Phylum: Porifera (sponges)

Sponge Wewokella
Pennsylvanian (upper Carboniferous)
Mineral Wells Fossil Park, Palo Pinto County, Texas
Kingdom: Animalia – Phylum: Cnidaria (coral)

Horn Coral Lyphophyllidum plummeri
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas
Kingdom: Animalia – Phylum: Brozoa

Bryzoa Tabulipora (Encrusting)
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Bryzoa Fenestella
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Bryzoa Fenestella in matrix
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas
Kingdom: Animalia – Phylum: Brachiopoda

Brachiopoda Hustedia mormoni
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Brachiopoda Composita Ovata
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Brachiopoda Rhipidomella carbonaria
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Brachiopoda Eridmatus texanus
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Brachiopoda Kutorginella lasallensis
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Brachiopoda Pulchratia symmetrica
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Brachiopoda Neochonetes acanthophorus
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Brachiopoda Linoproductus prattenianus
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Brachiopoda Crurithyris planoconvexa
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Brachiopoda Spiriferid
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas
Kingdom: Animalia – Phylum: Mollusca – Class: Bivalve (clams and oysters)

Bivalve Paleyoldia
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Bivalve Palaeoneilo oweni
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Bivalve Paleyoldia
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Bivalve Astartella varica
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Bivalve Myalina
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas
Kingdom: Animalia – Phylum: Mollusca – Class: Gastropoda (snails)

Snail Amphiscapha subrugosa
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Snail Solensicus typicus
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Snail Soleniscus primigenius
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Snail Trepospira illinoisensis
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Snail Trepospira illinoisensis
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Snail Worthenia tabulata
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Snail Bellerophon
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas
Kingdom: Animalia – Phylum: Mollusca – Class: Cephalopoda (squid and octopi)

Ammonite (shell fragments)
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Ammonite Metacoceras
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Ammonite Gonioloboceras
Pennsylvanian (Upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Nautiloid Euloxoceras
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Nautiloid Pseudorthoceras
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Nautiloid Shimanskya postremus
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Nautiloid Brachycycloceras
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas
Kingdom: Animalia – Phylum: Echinodermata – Class: Crinoidea

Crinoid Column
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Crinoid Column Floricyclus
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas

Crinoid Column Floricyclus
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas
Kingdom: Animalia – Phylum: Arthropoda- Class: Trilobite
I have not found one here yet.
I have a trilobite pygidium of the Palo Pinto roadcut of similar age.
Kingdom: Animalia – Phylum: Chordata- Class: Chrondrichthyes

Shark Tooth
Pennsylvanian (upper Carboniferous)
Finis Shale, Graham Formation, Jacksboro, Jack County, Texas