Contrasting compositions of the youngest Columbia River basalt flows in Union and Wallowa Counties, northeastern Oregon
Geological Society of America Bulletin
By: George W. Walker
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Abstract
Note: This paper is dedicated to Aaron and Elizabeth Waters on the occasion of Dr. Waters' retirement.
Several new chemical analyses of flows confined to a structural downwarp in northeastern Oregon indicate the first reported occurrence of Late-Yakima–type basalt in the region and the close stratigraphic association of Yakima–type and Late-Yakima–type flows, as well as andesite. The andesite is the most silicic flow rock yet found on the Columbia Plateau.
Suggested Citation
Walker, G.W., 1973, Contrasting compositions of the youngest Columbia River basalt flows in Union and Wallowa Counties, northeastern Oregon: Geological Society of America Bulletin, v. 84, no. 2, p. 425-429, https://doi.org/10.1130/0016-7606(1973)84<425:CCOTYC>2.0.CO;2.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Contrasting compositions of the youngest Columbia River basalt flows in Union and Wallowa Counties, northeastern Oregon |
| Series title | Geological Society of America Bulletin |
| DOI | 10.1130/0016-7606(1973)84<425:CCOTYC>2.0.CO;2 |
| Volume | 84 |
| Issue | 2 |
| Year Published | 1973 |
| Language | English |
| Publisher | Geological Society of America |
| Description | 5 p. |
| First page | 425 |
| Last page | 429 |
| Country | United States |
| State | Oregon |
| County | Union County, Wallowa County |
| Other Geospatial | Columbia River |