Kincaid Anticline (New)

Location

T13 and 14N, R3W, Christian and Sangamon Counties (F-5)

References

None

Description

The name Kincaid Anticline is proposed for an anticline that is prominent on a structure map of the top of the Mississippian Karnak Limestone Member (R. Howard, ISGS, unpublished mapping). The name is taken from the town of Kincaid, which is located on the southern end of the anticline. On Howard's map, the Kincaid Anticline is about 11 miles (18 km) long and plunges S15°E. Closure is mapped in the northern part of the fold; vertical relief is about 80 feet (24 m) on both flanks. The fold is relatively flat topped and has equal dips on both flanks.

The Kincaid Anticline also is shown on Nelson's (1987b) structure map of the Pennsylvanian Herrin Coal Member. The anticline is more irregular in outline and lower in relief on the coal than it is on theKarnak Limestone. A normal fault, the Sicily Fault, offsets the Herrin Coal along the west flank of the Kincaid Anticline. The fault is parallel to the fold axis and is downthrown toward the crest of the anticline.

The upward loss of structural relief suggests that the Kincaid Anticline, like many anticlines in central Illinois, may have developed during late Mississippian to early Pennsylvanian time. The Edinburg West and Kincaid Consolidated Oil Fields are situated on or close to the crest of the Kincaid Anticline.