Bulletin of the United States Geological SurveyThe Survey, 1971 |
From inside the book
Արդյունքներ 4–ի 1-ից 4-ը:
Էջ P-4
... Northwest - trending dolerite dikes east of Fourmile Canyon are generally believed to be feeders to the flows of basaltic andesite . Near Horse Canyon and Willow Creek the basaltic andesite is intruded and overlain by P4 CONTRIBUTIONS ...
... Northwest - trending dolerite dikes east of Fourmile Canyon are generally believed to be feeders to the flows of basaltic andesite . Near Horse Canyon and Willow Creek the basaltic andesite is intruded and overlain by P4 CONTRIBUTIONS ...
Էջ P-5
... northwest side of the Cortez Mountains , and the Cortez fault with 3,000 ... trend about N , 10 ° W. , cut the basaltic andesite , and in the vicinity of ... west of the area shown on pl . 1 ) has a reserve of 3.4 million tons averaging ...
... northwest side of the Cortez Mountains , and the Cortez fault with 3,000 ... trend about N , 10 ° W. , cut the basaltic andesite , and in the vicinity of ... west of the area shown on pl . 1 ) has a reserve of 3.4 million tons averaging ...
Էջ P-13
... northwest - trending mineralized faults . These zones were sites of intense clay alteration . The Tertiary sedimentary rocks which underlie the basaltic andesite are exposed in several small areas in a horst formed by the northwest - ...
... northwest - trending mineralized faults . These zones were sites of intense clay alteration . The Tertiary sedimentary rocks which underlie the basaltic andesite are exposed in several small areas in a horst formed by the northwest - ...
Էջ P-14
... northwest - trending faults . Metals in the area are weakly anomalous and generally restricted to the faults . No data on tellurium are available from this area . SUMMARY OF GEOCHEMICAL ANOMALIES Gold is strongly anomalous along the ...
... northwest - trending faults . Metals in the area are weakly anomalous and generally restricted to the faults . No data on tellurium are available from this area . SUMMARY OF GEOCHEMICAL ANOMALIES Gold is strongly anomalous along the ...
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Common terms and phrases
alaskite alluvium antimony antimony anomalies arsenic basaltic andesite flows carbonate rocks chert colluvium Cortez fault Cortez gold Cortez quadrangle Cortez silver deposits Elliott Eureka Counties exploration target GEOLOGICAL SURVEY gold and silver Granitic igneous rocks granodiorite Harold Masursky igneous bodies Individual high values jasperoid localities showing high localities with high lower Mill Canyon lower plate carbonate map area Marranzino mercury mercury and arsenic Mill Canyon stock Mill Canyon tract mineralized zone moderately anomalous table molybdenum molybdenum are weakly Mount Tenabo Mountains thrust fault Nevada nine elements northwest-trending Oligocene Ordovician Paleozoic plate siliceous facies plate siliceous rocks porphyry quartz monzonite rhyolite Roberts Mountains thrust sample localities showing sedimentary rocks selected metals southern Cortez Mountains Southwest basaltic Stoiser strong anomalies tellurium Tertiary gravel tract contains tract pl U.S. Geol upper Fourmile Canyon upper Mill Canyon upper plate siliceous Uteana Vinini Formation Willow Creek zinc zone in Mill