----------------------------Original message---------------------------- Depends on the location and age - the older the better. The folio for Yellowstone National Park sells for more than $100 if in good condition; folios of the mining regions also are worth a fair amount. Folios of some featureless plain sell for $10 or so. At 03:23 PM 9/10/97 EDT, you wrote: >----------------------------Original message---------------------------- >I have been told that the old USGS Geologic Atlases/folios are valuable? >These are the large 22" X 18" softbound quadrangle maps with text. Does >anyone know if that is true? KS > >Kathy Spencer [log in to unmask] >Geology Library Office: 701/777/2408 >University of North Dakota Fax: 701/777/4449 >P.O. Box 8358 >Grand Forks, ND 58202-8358 > OMNI Resources International Map Specialists [log in to unmask] http://www.omnimap.com/catalog