Hoko River Formation

Hoko River Formation
Stratigraphic range: Late Eocene
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Branchioplax washingtoniana, Hoko River Formation
TypeGeological formation
Unit ofTwin River Group
UnderliesMakah Formation sediments
OverliesLyre Formation sediments
Thicknessapproximately 2,300 metres (7,550 ft)
Lithology
Primarysubmarine fan system
Location
RegionClallam County, Olympic Peninsula Washington
CountryUnited States
Extentover 100 kilometres (62 mi)
Type section
Named bySnavely et al, 1978

The Hoko River Formation is a Late Eocene marine sedimentary geologic formation.[1] The formation is exposed in outcrops along the Strait of Juan de Fuca on the Olympic Peninsula in Washington state, USA. It is known for containing numerous fossils of crabs. It overlies the older Lyre Formation and underlies the younger Makah Formation.[1]

  1. ^ a b Cite error: The named reference Sanvely1978 was invoked but never defined (see the help page).