Archived report (descriptions no longer maintained)
Faults of Thebes Gap area, English Hill fault zone (Class A) No. 1027a
Last Review Date: 1997-11-17
| County(s) and State(s) |
SCOTT COUNTY, MISSOURI ALEXANDER COUNTY, ILLINOIS |
| Physiographic province(s) |
COASTAL PLAIN |
| Reliability of location |
Good Compiled at 1:172,000 scale. |
| Length (km) | km. |
| Average strike | |
| Sense of movement | Various |
| Dip Direction | NW; SE; NE; V |
| Historic earthquake | |
| Most recent prehistoric deformation | latest Quaternary (<15 ka) |
| Slip-rate category | Less than 0.2 mm/yr |
| References |
Harrison, R.W., 1999, Geologic map of the Thebes 7.5-minute quadrangle, Illinois and Missouri: U.S. Geological Survey Geologic quadrangle Map GQ-1779, scale 1:24,000. Harrison, R.W., and Schultz, A., 1994, Strike-slip faulting at Thebes Gap, Missouri-Illinois—Implications for New Madrid tectonism: Tectonics, v. 13, no. 2, p. 246-257. Harrison, R.W., Hoffman, D., Vaugn, J.D., Palmer, J.R., Wiscombe, C.L., McGeehin, J.P., Stephenson, W.J., Odum, J.K., Williams, R.A., and Forman, S.L., 1999, An example of neotectonism in a continental interior—Thebes Gap, Midcontinent, United States: Tectonophysics, v. 305, no. 1-3, p. 399-417. Harrison, R.W., Palmer, J.R., Hoffman, D., Vaughn, J.D., Forman, S.L., McGeehin, J., and Frederiksen, N.O., 1997, Profiles and documentation of fault-exploration trenches in the English Hill area, Scott City 7.5-minute quadrangle, Missouri: U.S. Geological Survey Open-File Report 97-474, 111 p. Nelson, W.J., Harrison, R.W., and Hoffman, D., 1999, Neotectonics of the northern Mississippi embayment: Illinois State Geological Survey Guidebook 30, 34 p. Palmer, J.R., Hoffman, D., Stephenson, W.J., Odorn, J.K., and Williams, R.A., 1997, Shallow seismic reflection profiles and geologic structure in the Benton Hills, southeast Missouri: Engineering Geology, v. 46, p. 217-233. Palmer, J.R., Shoemaker, M., Hoffman, D., Anderson, N.L., Vaughn, J.D., and Harrison, R.W., 1997, Seismic evidence of Quaternary faulting in the Benton Hills area, southeast Missouri: Seismological Research Letters, v. 68, p. 650-661. Stewart, D.R., 194, The Mesozoic and Cenozoic geology of southeastern Missouri: Missouri Division of Geology and Water Resources, 115 p. |