Graford Formation
78 distinct taxa, from 96 fossil occurrences the Paleobiology Database records under this name, spanning 323–299 Mya.
Texas · US
78 taxa · 96 fossils · 323–299 MyaFiled under the Canyon Group. Members recorded: Brownwood Shale, Bridgeport Shale, Wolf Mountain shale, Winchell, Wolf Mountain, Brownwood shale, Wolf Mountain Shale.
Macrostrat places this rock in the Canyon Group, and dates it 305–304 Ma. Macrostrat’s own record
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8 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.
When
What has been found
- Heliospongia excavata
- Paraschistoceras costiferum
- Ammobaculites
- Amphiscapha (Cylicioscapha) texana
- Composita subtilita
- Dermospheroidalis irregularis
- Endothyra
- Glaphyrites angulatus
- Glaphyrites anguloumbilicatus
- Hyperammina
- Orthovertella
- Paraschistoceras reticulatum
- Parashumardites fornicatus
- Pharkidonotus percarinatus
- Achistrum (Achistrum) brownwoodensis
- Achistrum ludwigi
- Ammodiscus incertus
- Amphiscapha catilloides
- Amphiscapha subquadrata
- Antiquatonia portlockianus
- Apotocardium obliquum
- Astartella concentrica
- Aviculopecten
- Bigenerina ciscoensis
- Cinclidonema texanum
- Coelocladia spinosa
- Cymatospira montfortianus
- Derbyia crassa
- Earlandia
- Endoplegma calathus
- Endothyranella
- Euconospira
- Euomphalus
- Euphemites blaneyanus
- Euphemites vittatus
- Eupleuroceras bellulum
- Fissispongia jacksboroensis
- Girtycoelia typica
- Glabrocingulum (Ananias) welleri
- Glabrocingulum grayvillense
The 40 most often recorded, of 78.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.