Lexington Dome

Location

T25N, R3E, McLean County (D-6)

References

Clegg 1972, Buschbach and Bond 1974

Description

The Lexington Dome is a roughly circular, symmetrical upwarp. Clegg (1972) mapped about 20 feet (6 m) of closure on the Pennsylvanian Danville Coal Member, and Buschbach and Bond (1974) indicated about 100 feet (30 m) of closure on the Cambrian Mt. Simon Sandstone. The enclosed area is about 2 miles (3 km) in diameter on the coal and 3.5 miles (5.6 km) on the Mt. Simon (fig. 25). The Lexington Dome is separated from the Lake Bloomington Dome on the northwest by a saddle. A gas storage field has been developed in the Mt. Simon.

See also HUDSON OOME.

Figure(s)

Figure 25   Cooksville Anticline and Hudson, Lake Bloomington, and Lexington Domes, McLean County. Black lines are structure contours (ft) on top of the Upper Cambrian Mt. Simon Sandstone. Red lines are residual gravity isogals. From Heigold et al. 1964.