When do placer deposits form

Geological Survey. Josiah Edward Spurr suggested the need for a journal sometime in November or December After informal discussions, nine of the founders met in the office of Waldemar Lindgren in the headquarters of the U.

Geological Survey in Washington, D. Eight of the men at the founding meeting formed the first board of directors; Spurr was president, Frederick L. Ransome, secretary, and George O. Smith, treasurer. Other members were Arthur H. Brooks, Marius R. Campbell, Walter H. Theninth man at the meeting was H. Foster Bain. Irving was appointed editor.

Lindgren, Ransome, and Campbell from the U. Geological Survey, together with three academics, James F. Leith of the University of Wisconsin, were appointed associate editors. The initial board members, the editor, and associate editors are the people we now recognize as the founders of Economic Geology.

Two others, Frank D. Gregory, of Glasgow University in Scotland, were subsequently added as associate editors, and a third person, W. Bayley of the University of Illinois, was appointed as business editor, but. Sign In or Create an Account. User Tools. Sign In. Advanced Search. Skip Nav Destination Book Chapter. Author s. Garnett R. Valrik Placer Consultancy Inc. Google Scholar. Thorium -- a possible alternate to uranium for fueling nuclear reactors -- occurs in monazite, whereas tin is produced from ilmenite.

Diamonds have been found in placers in Alberta, Canada. Beach sands in Florida host heavy-metal placers. Beach sands in southern India contain vast reserves of thorium, whose energy content exceeds that of the country's uranium reserves. Wind produced placers are found in Australia. Gold placers were first discovered by Europeans in the great Witwatersrand gold mining district of South Africa in the s.

Nash Soonawala retired in after a year career in the geological sciences. He now serves as a technical editor and writer. Soonawala holds Ph. Where to Rock Hunt Gems in Idaho. Type of Rock Found in Divergent Boundaries. Gems Found in Wisconsin. Geologists find ore deposits by testing the chemistry of the rock and soil. They can also determine the size of the deposit. Salt NaCl , sodium chloride, mineral substance of great importance to human and animal health, as well as to industry.

The mineral form halite, or rock salt, is sometimes called common salt to distinguish it from a class of chemical compounds called salts. Begin typing your search term above and press enter to search. Press ESC to cancel. Skip to content Home Social studies How does a placer deposit form? Social studies. Ben Davis January 26, How does a placer deposit form? Where are placer deposits found explain? Where are placer deposits found Class 11? Which is the oldest reported placer deposit in India?

Where do best diamonds come from? Who first found diamonds? Is placer mining expensive? What is a placer deposit? Which minerals are examples of placer deposits? What is the difference between placer deposit and dredging? What are placer deposits class 10th? Which is a pleasure Group of deposit? How are minerals formed in veins and lodes? What is a rich vein of ore called?