Lead-Zinc District of Illinois Historical Document Folder: Gray Property - USGS Detailed Sample Study of Drill Holes File: Gray 4.pdf UID: 633
Dates
Dataset Reference Date
2015-09-28
Info Date
1943-02-17
Info Date
1943-03-09
Summary
Historical Lead-Zinc District Document from Industrial Mineral Section Records Folder: Gray Property - USGS Detailed Sample Study of Drill Holes File: Gray 4.pdf Type: Log Author: Heyl, A.V. UID: 633
Summary
Historical Lead-Zinc District Document from Industrial Mineral Section Records Folder: Gray Property - USGS Detailed Sample Study of Drill Holes File: Gray 4.pdf Type: Log Author: Heyl, A.V. UID: 633