File:Penn carbondale 4-44.jpg
Figure 4-44. Graphic log of core (partial) from Freeman United Coal Mining Company hole C-1-74 in sec. 23, T 12 N, R 6 W, Macoupin County, Illinois, the principal reference section for the Excello Shale and Houchin Creek Coal Members in Illinois. © University of Illinois Board of Trustees.
Click on a date/time to view the file as it appeared at that time.
|current||19:18, 23 December 2020||1,266 × 3,627 (625 KB)||IlLex|
- You cannot overwrite this file.