Original file (2,093 × 2,653 pixels, file size: 981 KB, MIME type: image/jpeg)
Figure 47 Map showing the thickness of the Murphysboro Coal near the Oraville channel in Jackson and Perry Counties, southwestern Illinois. From Jacobson (1983).
Click on a date/time to view the file as it appeared at that time.
|current||15:41, 11 July 2020||2,093 × 2,653 (981 KB)||Alan.Myers|