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Reducing Hazards in Underground Coal Mines Through the Recognition and Delineation of Coalbed Discontinuities Caused by Ancient Channel Processes
| Author: | Kertis, Carla A. |
|---|---|
| Year: | 1985 |
| Document Type: | N/A |
| SUDOC: | I 28.23:8987 |
| Series: | United States Bureau of Mines Reports |
| Report Number: | R. I. 8987 |
| Subjects: | Coal -- Geology -- Pennsylvania -- Indiana County. |
| Coal -- Geology -- Pennsylvania -- Armstrong County. | |
| River channels. | |
| Coal mines and mining -- Pennsylvania -- Indiana County -- Safety measures. | |
| Coal mines and mining -- Pennsylvania -- Armstrong County -- Safety measures. | |
| Link: | http://digital.library.unt.edu/ark:/67531/metadc38731/ |
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