Link to USGS Home Page

Coal Resource Classification System of the U.S. Geological Survey

By Gordon H. Wood, Jr., Thomas M. Kehn, M. Devereux Carter, and William C. Culbertson

GEOLOGICAL SURVEY CIRCULAR 891


Figure 31 - five geophysical logs of a coal exploration drill hole showing response to coal and limestone
PREVIOUS

Created by the EERT WWW Staff.

[an error occurred while processing this directive]