Heebner Shale Member, Plattsmouth, Cass County, NE (Schram, 1984, Location 1): Virgilian, Nebraska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Malacostraca
- Stomatopoda
- Gorgonophontidae
|
|||||||
| 2 specimens | |||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Nebraska | County: | Cass County |
| Coordinates: | 41.0° North, 95.9° West (view map) | ||||
| Paleocoordinates: | 2.4° North, 25.2° West (Wright 2013) | ||||
| Basis of coordinate: | estimated from map | ||||
| Altitude: | 950 feet | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Carboniferous | Epoch: | Pennsylvanian |
| Stage: | Gzhelian | 10 m.y. bin: | Carboniferous 5 |
| Key time interval: | Virgilian | ||
| Age range of interval: | 303.7 - 298.9 m.y. ago |
Stratigraphy
| Geological group: | Shawnee | Formation: | Oread | Member: | Heebner Shale |
| Stratigraphic resolution: | member |
Lithology and environment
| Primary lithology: | fine,black "shale" |
| Lithology description: the black shales are "fine grained and sheety in form, with bedding slabs not particularly thin or paperlike" | |
| Environment: | deep-water indet. |
| Geology comments: "black shales seem to represent a deep-water phase of a transgressive-regressive sequence" | |
Taphonomy
| Modes of preservation: | mold/impression,adpression,original carbon,replaced with pyrite |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | excellent |
Collection methods and comments
| Collection excludes: | all macrofossils |
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | taxonomic analysis |
| Taxonomic list comments:In addition to the arthropods, the shale contains abundant conodonts and fish spines | |
Metadata
| Database number: | 50932 | ||
| Authorizer: | J. Alroy | Enterer: | D. Lamb |
| Modifier: | D. Lamb | Research group: | marine invertebrate |
| Created: | 2005-05-24 16:28:22 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2005-05-24 16:28:22 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 13598. | F. R. Schram. 1984. Upper Pennsylvanian arthropods from black shales of Iowa and Nebraska. Journal of Paleontology 58(1):197-209 [J. Alroy/D. Lamb/D. Lamb] |