Cooksville Anticline (New)

Location

T24 and 25N, R4E, McLean County (D-6)

References

None

Description

The name Cooksville Anticline is introduced to refer to an elongated structural high near the village of Cooksville in northeastern McLean County. As contoured on the Cambrian Mt. Simon Sandstone (fig. 25), the Cooksville Anticline is approximately 6 miles (10 km) long and up to 1.5 miles (2.5 km) wide; it has about 40 feet (12 m) of closure. The Cooksville Anticline adjoins the Lexington, Lake Bloomington, and Hudson Domes, but unlike the domes, Cooksville is not associated with a gravity high (fig. 25). The Cooksville Anticline was defined using drilling and seismic surveys made during exploration for underground gas storage reservoirs, but no gas is stored there now.

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.