Ransom Syncline (Discarded)

Location

From northern La Salle to southern Livingston County

References

Willman and Payne 1942

Description

This long and subtle depression was mapped from subsurface data on various Cambrian and Ordovician horizons. The position and trend of the axis, as indicated by Willman and Payne (1942), vary somewhat at different levels. On their structure map of the top of the Galena Group, Bristol and Buschbach (1973) showed a trough approximately in the position of Willman and Payne's (1942) Ransom Syncline between the Pontiac Dome and Ancona Anticline. Willman and Payne (1942) had no information on the Pontiac Dome, which has proved to be one of the largest structures in the area. Because of its ambiguous definition, use of the name Ransom Syncline should be discontinued.