Author : United States. Bureau of Mines
Publisher : Unknown
Page : 28 pages
File Size : 53,8 Mb
Release : 1947
Category : Bituminous coal
ISBN : UCAL:$C23153
Thickness of Bituminous-coal and Lignite Seams Mined in the United States in 1945 by United States. Bureau of Mines Pdf
Bituminous coal and lignite seams of the United States and Alaska range from less than 2 feet in thickness to more than 50 feet, but the majority of the Nation's coal mines produce from seams 3 to 6 feet thick and the average of the country is 65 inches. Contains information on coal seams of the United States as well as other data on coal production from strip and underground bituminous coal and lignite mines 1945.