Dan River Group
The Dan River Group is a geologic group in Virginia and North Carolina. It preserves fossils dating back to the Triassic period.
| Dan River Group | |
|---|---|
| Stratigraphic range: Late Triassic | |
| Type | Group |
| Unit of | Newark Supergroup |
| Sub-units | Stoneville Formation, Cow Branch Formation, Dry Fork Formation, Walnut Cove Formation, Pine Hall Formation |
| Location | |
| Region | Virginia, North Carolina |
| Country | United States |
| Type section | |
| Named for | Dan River |
| Named by | Thayer (1970) |
It contains five geological formations, from youngest to oldest:
- Stoneville Formation (cyclical red mudstone)
- Cow Branch Formation (cyclical fossiliferous black/dark grey mudstone with rare coarser lithologies)
- Dry Fork Formation (cyclical tan/red sandstone and grey/purple/red mudstone)
- Walnut Cove Formation (cyclical black/grey mudstone, sandstone, and coal)
- Pine Hall Formation (coarse tan sandstone and red mudstone)
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