Blue Diggings Fault

Part of the Fluorspar Area Fault Complex

Location

Sections 6 and 8, T13S, R8E, southwestern Hardin County (pl. 2)

References

S. Weller et al. 1920, Hubbert 1944, J. Weller et al. 1952, Baxter and Desborough 1965

Description

The Blue Diggings Fault was so named because it carries the Blue Diggings vein, one of the largest fluorspar veins in the Rosiclare district. The fault itself is part of a broad, complex fracture zone on the southeast side of the Rock Creek Graben. It is a north-trending normal fault, and the east side is downthrown less than 100 feet (30 m). The dip of the fault is locally as shallow as 45°, which is an unusually low dip for faults in the Fluorspar Area Fault Complex.

Figure(s)

Plate 2   Fluorspar Area Fault Complex and Shawneetown Fault Zone