Puget Group
Geologic group in Washington state, USA / From Wikipedia, the free encyclopedia
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The Puget Group is a geologic group in Washington (state). It preserves fossils dating back to the Paleogene period.
Quick Facts Type, Sub-units ...
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 |
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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]