- Usage in publication:
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- Box Canyon Member
- Modifications:
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- Named
- AAPG geologic province:
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- Okanogan province
Summary:
Unit is named the Box Canyon Member of the Tiger Formation (revised) for rocks in the area northwest and southwest of Ione and west to southwest of Tiger in northeastern WA. Consists of massive to horizontally and planar cross-bedded conglomerate and minor amounts of sandstone, siltstone, shale, and coal. Clast lithology varies laterally. Overlies Paleozoic strata and possibly overlies Precambrian greenstone and Cretaceous granite; pinches out below the Lost Creek Member (new) of the Tiger Formation south of Tiger. Thickness is at least 600 m at the type section and may be more than 1500 m. Age ranges from early middle Eocene, based on inclusions of late early to early middle Eocene volcanic rock clasts, through middle Miocene, although the age determination of middle Miocene, based on middle Miocene regional faults that bound the Tiger Formation, 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.
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Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).