Trepassey Formation
| Trepassey Formation | |
|---|---|
| Stratigraphic range: Ediacaran | |
Trepassey Bay, the locality after which the formation is named. | |
| Type | Formation |
| Unit of | St John's Group |
| Sub-units | See: Members |
| Underlies | Fermeuse Formation |
| Overlies | Mistaken Point Formation |
| Thickness | 300 m (984 ft) |
| Lithology | |
| Primary | Gray Sandstone |
| Other | Shale, Tuff, Mudstone, Siltstone, Agglomerate |
| Location | |
| Coordinates | 46°40′N 53°20′W / 46.66°N 53.34°W |
| Region | Newfoundland |
| Country | Canada |
| Type section | |
| Named for | Trepassey Bay |
Occurrence in southeast NL | |
The Trepassey Formation is a geologic formation that crops out in Newfoundland, which consists of gray sandstones and rare tuffaceous rocks. It also preserves fossils dating back to the Ediacaran period, which were buried on a deep ocean marginal slope.