Equality Fault

Part of the Wabash Valley Fault System

Location

T8 and 9S, R9E, Gallatin County (J-7)

References

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

Description

Bristol (1975) mapped the Equality Fault as branching northeastward off and forming a graben with the Albion-Ridgway Fault Zone. Bristol and Treworgy (1979) reinterpreted the structure as a flexure rather than a fault. Nelson and Lumm (1987) showed the Equality Fault, although they did not name it, on their structure map of the Springfield Coal Member (Pennsylvanian). Their subsurface data indicate about 80 feet (25 m) of throw, down to the west on this fault in Section 5, T9S, R9E, Gallatin County. The name Equality Fault is reinstated here.