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Origin of the boghead coals

Professional Paper 132-I

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Abstract

The bituminous rocks of sedimentary origin may be classified roughly under two main heads - coals and bituminous shales. In a strict sense no definite line can be drawn between these two groups, because coals may be insensibly grade into bituminous shales. Chemically the boghead coals are preeminently bituminous.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Origin of the boghead coals
Series title:
Professional Paper
Series number:
132
Chapter:
I
Year Published:
1925
Language:
English
Description:
17 p.
Larger Work Type:
Report
Larger Work Subtype:
USGS Numbered Series
Larger Work Title:
Shorter Contributions to General Geology, 1923-24
First page:
121
Last page:
137
Country:
United States