Item Number: OFS95-06
Map Scale: 1:24,000

OVERVIEW: These maps summarize the overall geologic terrain and stratigraphy associated with unconsolidated deposits within the Evansville region. Recognition of the distribution of geologic materials within these deposits, and the interpretation of sedimentologic processes that determined that distribution, is critical in the mapping of potential earthquake site response and in considerations of ground-water protection. Geologic records within the areas of the Evansville North and Evansville South 7.5-minute Quadrangles were collected from numerous sources. They were organized in electronic and hard-copy data bases. The data include records of engineering borings, Indiana Geological Survey test borings, water wells, and over 100 Survey-generated natural gamma-ray logs. Fifteen new test holes were drilled specifically for this project. Holes were drilled by rotary or hollow-stem-auger methods and were logged at various scales. The combination of sample sets and log profiles was the basis of interpretations of depositional sequences and map units.



Eggert, D. L., Woodfield, M. C., Bleuer, N. K. 1995, Geologic terrain maps of the Evansville, Indiana region: Indiana Geological Survey Open-File Study 95-06, 11 p.

Notes: Publications in the Indiana Geological Survey Open-File series have been inconsistently named using a variety of series titles including "Open-File Report," "Open-File Map," and "Open-File Study." Prior to 1994, a publication in this series was generally referred to as an "Open-File Report" (but not always). To help reduce confusion created by these inconsistencies, the IGS now refers to every publication in the Open-File series as an "Open-File Study." To be entirely correct in writing a bibliographic reference for a publication, one should use the series name and number that appears on the publication itself.

Includes cross sections in color.


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Keywords: statemap, terrain, geologic map, Quaternary, environmental

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Updated 8/19/2020