Graham-Ginte Syncline

Part of the Upper Mississippi Valley Zinc-Lead District

Location

T29N, R1E, Jo Daviess County (A-3)

References

Willman and Reynolds 1947, Bradbury et al. 1956

Description

Bradbury et al. (1956) mapped a syncline with a sinuous axis approximately 2.5 miles (4 km) long. It has less than 30 feet (9 m) of structural relief. Willman and Reynolds (1947) suggested that the syncline resulted from solution-collapse of carbonates along a major joint system.