Contrasting compositions of the youngest Columbia River basalt flows in Union and Wallowa Counties, northeastern Oregon
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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.
Study Area
Publication type | Article |
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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 |
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