Junction Fault

Part of the Wabash Valley Fault System

Location

T9S, R9E, Gallatin County (J-7 and pl. 2)

References

Bristol 1975, Bristol and Treworgy 1979, Nelson and Lumm 1987

Description

The Junction Fault is about 3 miles (4.5 km) long and extends northeastward from the northeast corner of Section 20 to the northeast comer of Section 10. Closely spaced coal test borings show the southeast side to be down thrown as much as 90 feet (27 m). Underground workings of the Peabody Coal Company Eagle No. 2 Mine cross the fault near its northeastern end. A narrow zone of parallel, high-angle normal faults is exposed in the mine (fig. 43).

Figure(s)

Figure 43   Field sketches of the zone of faulting at the Junction Fault in entries of an underground coal mine, Gallatin County, show major displacements down to the east, and many small antithetic and synthetic dip-slip normal faults. Drawings represent the north wall of two parallel headings about 75 feet (23 m) apart. Upper sketch by J. T. Popp, lower sketch by W.J. Nelson. Plate 2   Fluorspar Area Fault Complex and Shawneetown Fault Zone