 | | Report (issue) | | U.S. GEOLOGICAL SURVEY Geology of East-Central Alaska by Helen L. Foster, Terry E. C. Keith, and W. David...the USGS. 1 Menlo Park, California East-Central Alaska Contributors and acknowledgements...................2 Yukon-Tanana terrane north of the Tanana River............................3 Stratigraphy.........southwestern Eagle, and northern Big Delta, southwestern Charley River, Livengood, and Fairbanks quadrangles)...northern Big Delta, southwestern Charley River, Livengood, and Fairbanks quadrangles)...................... |  | | Report (issue) | | PLACER MINING IN THE FORTYMILE, EAGLE, AND SEVENTYMILE RIVER, DISTRICTS. By E. A. PORTEK. GENERAL CONDITIONS...value of the .combined gold production of the Fortymile and Seventymile river districts for 1911 was...large areas of overburden in order to get at the gold on bedrock. The winter operations were somewhat...among the smaller operators. 'The increase of the gold output for 1911 over that for 1910 must be attributed...headwaters of Fortymile River. They were the only dredges in operation in the district during 1911, but their |  | | Report (volume) | | SMITH, DIRECTOR BULLETIN 520 MINERAL RESOURCES OF ALASKA REPORT ON PROGRESS OF INVESTIGATIONS IN 1911 BY...Brooks.................................. 7 The mining industry in 1911, by Alfred H. Brooks............the Pacific seaboard to Fairbanks, by Alfred H. Brooks. . Tin resources of Alaska, by Frank L. Hess.......and Bremner River districts, by Fred H. Moffit................... The Chitina copper district, by Fred H........... Gold deposits near Valdez, by Alfred H. Brooks.............................. Gold deposits of |  | | Report (issue) | | PLACER MINING IN THE YUKON-TANANA REGION. By C. E. ELLSWORTH and G. L. PARKER. INTRODUCTION. It is the...brief summary of the general progress of placer mining in the Yukon-Tanana region during 1910. The writers...water-supply investigation of the Fairbanks, Circle, Tenderfoot, Eagle, and Seventymile placer districts of the...Yukon-Tanana region, and incidentally some notes on mining operations were made. Much of the material embodied...several districts. The decrease in the value of the gold production of the YukonTanana region from $10,720 |  | | Report (issue) | | LODE MINING NEAR FAIRBANKS. By PHILIP S. SMITH. INTRODUCTION. The inevitable depletion of easily mined...mined placer deposits near Fairbanks and the consequent availability of both men and money for other enterprises...opening of some productive mines. The writer visited the lode-mining district late in the open season of...investigations here recorded were devoted exclusively to mining developments. The writer is under deep obligations...mine owners, operators, and residents of the Fairbanks region. Although specific mention is necessarily |  | | Book (volume) | | THE GEOLOGY OF ALASKA The Geology of North America 'll L *• / ^ X, ^x /yj 5*? ^^vrA. j /X XxT &...Geology of North America Volume G-l The Geology of Alaska Edited by George Plafker U.S. Geological Survey...Congress Cataloging-in-Publication Data The Geology of Alaska / edited by George Plafker and Henry C. Berg, p...educational advancement. 1. Geology—Alaska. 2. Mines and mineral resources—Alaska. I. Plafker, George, 1929. II...north from over the Chaix Hills along the Gulf of Alaska. Bedded marine Tertiary rocks of the Yakutat terrane |  | | Report (volume) | | Geologic Studies in Alaska by the U.S. Geological Survey, 1994 AVAILABILITY OF BOOKS AND MAPS OF THE...to Superintendent of Documents.) • ANCHORAGE, Alaska-4230 University Dr., Rm. 101 • LAKEWOOD, Colorado-Federal...at the U.S. Geological Survey offices: • FAIRBANKS, Alaska-New Federal Building, 101 Twelfth Ave. •...SPACE CENTER, Mississippi-Bldg. 3101 Residents of Alaska may order maps from U.S. Geological Survey, Earth...Center 101 Twelfth Ave., Box 12 Fairbanks, AK 99701 Geologic Studies in Alaska by the U.S. Geological Survey |
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