Geologic Cracks Record
![New Madrid seismic zone](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/fig1sm.jpg?itok=mw83ve3G)
Detailed Description
Overview of the New Madrid seismic zone (NMSZ) in the Mississippi River valley with faults (black), earthquakes (yellow stars), and locations of sackungen features (red dots). Click on image to view larger version.
Sources/Usage
Public Domain.