Map of Deep Structures in Ohio
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Basement Structures in Ohio
This map portrays a number of deep faults and other structures that have been identified by a variety of geologic studies. Some faults are well known, whereas others are speculative. Very few of them are visible at the surface. The Anna, or Fort Wayne, rift in western Ohio is the site of numerous historic earthquakes. Modified from Division of Geological Survey Digital Chart and Map Series No. 7 (1991).
NOTE: This map has been replaced by Digital Map Series PG-23.
Buy online now: Paper Map or CD-ROM
Download 2013, Version 2.0, of report and map here [3 MB PDF]
Download the digital data for PG-23
Download 2002 Version 1.0 of report and map. [2.3 MB PDF]