Pages for logged out editors learn more
You do not have permission to edit this page, for the following reason:
The action you have requested is limited to users in the group: Users.
Save page Show preview Show changes Cancel
Verified Coordinates: Latitude, Longitude (i.e 38.077,-89.030)
Add another
Add Location
Add Geology
The northern part of the mine had northwest-trending faults of the Cottage Grove Fault System and north-northwest-trending high-angle normal faults of the White Ash Fault Zone in the western part of the mine. The roof was a massive gray shale over the entire mine, ranging from 2 inches to over 10 feet. In the eastern part of the mine, it ranged from 2 to 36 inches and came down readily. Where possible, 1 to 2 feet of coal were left to support the roof. The upper surface of the coal was very irregular. There were many slips in the roof, which allowed much water to come into the mine. Some slips and rolls were present in the coal. Slips also necessitated timbering. One roll came down into the coal 2 feet and was 50 feet long. The coal remained full thickness. Pyrite lenses and stringers, and calcite and gypsum fracture fillings were present in the coal. The floor was 2 inches to 4 feet of hard brittle dark gray shale. Where this clay shale was thick and the rooms were cut too wide, the floor tended to heave if it became wet, or else the roof came down.
Add Production
Add Source
Add Bibliography
tooltip If you need to start a line using an asterisk add <code>< nowiki ></code> before the asterisk and <code>< /nowiki > </code>after to get an Asterisk (remove the space in the code
Add Notes