Puget Group

Puget Group
Stratigraphic range: Paleogene
TypeGroup
Sub-unitsTiger Mountain, Tukwila, Renton
Lithology
PrimaryDeltaic
OtherMarine, Riverine, Volcanic
Location
RegionKing County, Washington
CountryUnited 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. 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.

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