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| Geologic Disturbances in Illinois Coal Seams | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Channels | Split Coal | Rolls | Limestone Bosses | Clay Dikes | White Top | Igneous Dikes | Joints | Coal Balls | Miscellaneous Disturbances | Acknowledgments |
Pleistocene Channels
Pennsylvanian Channels
Channels of Anvil Rock Sandstone
Walshville Channel
Galatia Channel
Distinguishing channels from geological faults
References
Circular 530 Channels
Circular 530 Channels