Geologic History of Black Hills Gold Placers
Author : Joseph Peter Connolly
Publisher :
Page : 16 pages
File Size : 27,86 MB
Release : 1946
Category : Geology
ISBN :
Author : Joseph Peter Connolly
Publisher :
Page : 16 pages
File Size : 27,86 MB
Release : 1946
Category : Geology
ISBN :
Author : William A Szary M S
Publisher : Independently Published
Page : 132 pages
File Size : 18,6 MB
Release : 2022-04-28
Category :
ISBN :
The geology of the Black Hills National Forest is dominated by exposures of Precambrian rocks following erosion of the Paleozoic, Mesozoic, and Cenozoic sequences that were domed up from granitic intrusions and later eroded. Proterozoic plutonism metamorphosed and deformed many of the Precambrian rocks along with fault development. During these intrusive processes, gold deposits and associated mineralization occurred under several different types of emplacement. In addition to lode gold emplacement, erosion stripped many of the primary gold into placer gold deposits during Phanerozoic time. Three chapters are included to describe the geology of lode and placer gold in the Black Hills National Forest. Chapter 1 provides an introduction to the Black Hills geology. Chapter 2 presents Black Hills deposits mostly as lode gold deposits. Chapter 3 presents geomorphic descriptions of placer gold deposits and where they might be found.
Author : Jan Cerney and Roberta Sago
Publisher : Arcadia Publishing
Page : 128 pages
File Size : 30,5 MB
Release : 2015-05-11
Category : History
ISBN : 1467113972
Rising out of the prairie, the Black Hills of South Dakota and Wyoming had long been rumored to have promising quantities of gold. Sacred to the Lakota, the Black Hills was part of the land reserved for them in the Fort Laramie Treaty of 1868. However, the tide of prospectors seeking their fortune in the Black Hills was difficult to stem. Members of the 1874 Custer expedition, lead by Gen. George Armstrong Custer, found gold. In 1875, scientists Henry Newton and Walter Jenney conducted an expedition and confirmed the rumors. By 1876, the trickle of prospectors and settlers coming to the Black Hills was a flood. The US government realized that keeping the interlopers out was impossible, and in 1877 the Black Hills was officially opened to settlement. In this sequel to their Black Hills Gold Rush Towns book, the authors expand their coverage of Black Hills towns during the gold-rush era.
Author : Richmond L. Clow
Publisher : Historical Preservation Series
Page : 228 pages
File Size : 24,76 MB
Release : 2002
Category : History
ISBN :
Clow (Native American studies, U. of Montana-Missoula) offers an overview of the gold milling industry in the Black Hills of South Dakota. A miner's geology of the region is followed by discussion of the developing industrial processes that led to each major shift in technology, from the construction of the first mills to the refinement of the blue refractory ores. The book includes abundant b & w illustrations, primarily of the buildings and landscapes. Annotation copyrighted by Book News, Inc., Portland, OR
Author :
Publisher : SDSHS Press
Page : 244 pages
File Size : 36,72 MB
Release : 2012
Category : History
ISBN : 0984504109
Author : Watson Parker
Publisher :
Page : 298 pages
File Size : 22,83 MB
Release : 1982
Category : History
ISBN :
Author :
Publisher :
Page : 428 pages
File Size : 34,2 MB
Release : 1974
Category : Geology
ISBN :
Author :
Publisher :
Page : 558 pages
File Size : 42,12 MB
Release : 1986
Category : Geology
ISBN :
Author : Geological Survey (U.S.)
Publisher :
Page : 492 pages
File Size : 41,69 MB
Release : 1967
Category :
ISBN :
Author :
Publisher :
Page : 648 pages
File Size : 48,23 MB
Release : 1968
Category : Geology
ISBN :