- Usage in publication:
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- Jared Member
- Modifications:
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- Named
- AAPG geologic province:
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- Okanogan province
Summary:
Unit is named the Jared Member of the Tiger Formation (revised). Exposed in the Cusick region of northeastern WA. Consists of conglomerate containing clasts of two-mica granite and subordinate phyllitic metasedimentary rocks. Conformably overlies the Locke Member (new) of the Tiger Formation east of the Cusick Creek fault; unconformably overlies the Locke Member west of the fault. Correlates with the Calispell Lake Member (new) of the Tiger Formation and records erosion of older Tiger strata. Maximum thickness is 700 m. Age ranges from early middle Eocene based on inclusions of late early to early middle Eocene volcanic rock clasts through middle Miocene, based on middle Miocene regional faults that bound the Tiger Formation, although the age determination of middle Miocene is less definite. (B1565)
Source: GNU records (USGS DDS-6; Menlo GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).