| Puget Group | |
|---|---|
| Stratigraphic range: Paleogene | |
| Type | Group |
| Sub-units | Tiger Mountain, Tukwila, Renton |
| Lithology | |
| Primary | Deltaic |
| Other | Marine, Riverine, Volcanic |
| Location | |
| Region | King County, Washington |
| Country | United States |
The Puget Group is a geologic group in Washington (state). It preserves fossils dating back to the Paleogene period.
In the northern area of group around Renton, Washington, the Group has been divided into three formations (from oldest to youngest), the Tiger Mountain Formation, the Tukwila Formation, and Renton Formation.[1][2] Robin Burnham (1994) specifies that these formations have not been defined and extended to Puget Group outcrops to the south within the Green River gorge and all of the Tukwila formation rocks are missing. The Puget Group has been mapped across a total of six western Washington geographic quadrangles.[1]
- ^ a b Burnham, R.J. (1994). Paleoecological and Floristic Heterogeneity in the Plant-Fossil Record - An Analysis Based on the Eocene of Washington (Report). Bulletin. United States Geological Survey. pp. 1–36. doi:10.3133/b2085B. hdl:2027/mdp.39015095145341. 2085-B.
- ^ Booth, Derek; Walsh, Timothy; Troost, Kathy; Shimel, Scott. "Geologic Map of the East Half of the Bellevue South 7.5' x 15' Quadrangle, Issaquah Area, King County, Washington,U.S. Geological Survey Scientific Investigations Map 3211, scale 1:24,000" (PDF). USGS. Retrieved 27 May 2020.