GREGORY A DAVIS, PETER W LIPMAN; REVISED STRUCTURAL SEQUENCE OF PRE-CRETACEOUS METAMORPHIC ROCKS IN THE SOUTHERN KLAMATH MOUNTAINS, CALIFORNIA. GSA Bulletin ; 73 (12): 1547–1552. doi: https://doi.org/10.1130/0016-7606(1962)73[1547:RSSOPM]2.0.CO;2
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Detailed mapping in the southern Klamath Mountains has demonstrated that meta-sedimentary rocks previously included in the Abrams Formation (Hershey, 1901) comprise two distinct units which are separated by the metavolcanic Salmon Formation. Accordingly, the two units have been renamed: quartzites and phyllites below the Salmon Formation and calcareous, siliceous, and amphibolitic rocks above it are named the Stuart Fork and Grouse Ridge formations, respectively.