Toad-Grayling Formation
| Toad-Grayling Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Sub-units | Toad Formation Grayling Formation |
| Underlies | Liard Formation |
| Overlies | Fantasque Formation |
| Lithology | |
| Primary | Siltstone, shale |
| Other | Limestone, dolomite |
| Location | |
| Coordinates | 59°2′8″N 125°13′11″W / 59.03556°N 125.21972°W |
| Region | British Columbia |
| Country | Canada |
| Type section | |
| Named for | Toad and Grayling Rivers |
| Named by | E.D. Kindle, 1944 |
Toad Formation, Grayling Formation, and Toad-Grayling Formation are obsolete names for the strata of the Early to Middle Triassic Doig and Montney Formations. They were applied in the foothills and Rocky Mountains of northeastern British Columbia, on the western edge of the Western Canada Sedimentary Basin. Although the names are considered obsolete, their usage persists.
The Toad and Grayling strata have yielded fossils of marine organisms, including ammonites, brachiopods, and bivalves.