Age:

Mississippian

Type designation:

Type section: The Guthrie Creek was named by Stockdale (1929, p. 240). The type section is along a road at the site of two abandoned quarries on the west bluff of Guthrie Creek about 0.25 miles (0.4 km) east of the town of Leesville near the center of the NE¼ sec. 27, T. 5 N., R. 2 E., Lawrence County, Indiana (Rexroad, 1986).

History of usage:

Change in rank: The Guthrie Creek was named as a member of the lower part of the Harrodsburg Limestone by Stockdale (1929, p. 240) but was reduced to the rank of a bed by Nicoll and Rexroad (1975, p. 9) (Rexroad, 1986).

Description:

The Guthrie Creek Bed consists of discontinuous lenses that range from zero to 10 ft (3.1 m) in thickness (Rexroad, 1986). It includes dolosiltite, calcareous shale (that in places is silty or sandy), siliceous and cherty limestone, and minor fossiliferous lenses (Rexroad, 1986).

Distribution: The Guthrie Creek can be recognized in places from central Harrison County, Indiana, northward into Monroe County, Indiana (Rexroad, 1986). The name "Guthrie Creek" is not used in the subsurface (Rexroad, 1986).

Boundaries:

The Guthrie Creek Bed is conformable within the Harrodsburg Limestone (Rexroad, 1986).

Correlations:

See Harrodsburg Limestone webpage for correlations.

Regional Indiana usage:

Illinois Basin Margin (COSUNA 12)
Supergroup: none
Group: Sanders Group
Formation: Harrodsburg Limestone
Member: none
Bed: Guthrie Creek Bed

Misc/Abandoned Names:

None

Geologic Map Unit Designation:

Mhgc

Note: Hansen (1991, p. 52) in Suggestions to authors of the reports of the United States Geological Survey noted that letter symbols for map units are considered to be unique to each geologic map and that adjacent maps do not necessarily need to use the same symbols for the same map unit. Therefore, map unit abbreviations in the Indiana Geologic Names Information System should be regarded simply as recommendations.

COSUNA areas and regional terminology

Names for geologic units vary across Indiana. The Midwestern Basin and Arches Region COSUNA chart (Shaver, 1984) was developed to strategically document such variations in terminology. The geologic map (below left) is derived from this chart and provides an index to the five defined COSUNA regions in Indiana. The regions are generally based on regional bedrock outcrop patterns and major structural features in Indiana. (Click the maps below to view more detailed maps of COSUNA regions and major structural features in Indiana.)

COSUNA areas and numbers that approximate regional bedrock outcrop patterns and major structural features in Indiana.

Major tectonic features that affect bedrock geology in Indiana.

References:

Hansen, W. R., 1991, Suggestions to authors of the reports of the United States Geological Survey (7^th ed.): Washington, D.C., U.S. Geological Survey, 289 p.

Nicoll, R. S., and Rexroad, C. B., 1975, Stratigraphy and conodont paleontology of the Sanders Group (Mississippian) in Indiana and adjacent Kentucky: Indiana Geological Survey Bulletin 51, 33 p.

Rexroad, C. B., 1986, Guthrie Creek Bed, in Shaver, R. H., Ault, C. H., Burger, A. M., Carr, D. D., Droste, J. B., Eggert, D. L., Gray, H. H., Harper, Denver, Hasenmueller, N. R., Hasenmueller, W. A., Horowitz, A. S., Hutchison, H. C., Keith, B. D., Keller, S. J., Patton, J. B., Rexroad, C. B., and Wier, C. E., Compendium of Paleozoic rock-unit stratigraphy in Indiana–a revision: Indiana Geological Survey Bulletin 59, p. 55.

Shaver, R. H., coordinator, 1984, Midwestern basin and arches region–correlation of stratigraphic units in North America (COSUNA): American Association of Petroleum Geologists Correlation Chart Series.

Stockdale, P. B., 1929, Stratigraphic units of the Harrodsburg Limestone: Indiana Academy of Science Proceedings for 1928, v. 38, p. 233–242.