Mine Sections Area 3 Station 1. USGS Section. Black silty claystone roof Coal 10 Bone 6 Dirty coal 6 Boned carb shale 10 Gray clay USBM (Records dip of 50 N 50W) 3. USBM Section Dip 6° N 50°W, drift S 40°E. Roof sandy shale Bone 3½ Coal 4 Bone 1 Coal 17½ Clay bottom 6. USGS Section Black shale with marine fossils Limestone, fossiliferous 7 Black shale, " " 18 Coal 24 Light gray silty claystone 9. USGS Section Black shale roof Bone 4½ Black shale 2 Coal 26 Gray soft clay bottom. Altitude on coal N 45° E 5°W