Description
Geologic Map of Morrill County, Nebraska (GMC-28) Swinehart, J. B., Diffendal, R. F., Jr. (1:62,500; 1995), size 54" x 40". Description: USGS Map I-2496. Includes section on new 40Ar/39Ar laser fusion ash dates from the Wildcat Ridge, Nebraska by Swisher, C. C.
Details
| SKU | GMC-28 |
|---|---|
| Price | $8.50 |