Chromolithograph of "Metamorphic Rocks-Borders of the Desert"

U.S. War Department · 1856

This tinted lithograph of “Metamorphic Rocks - Borders of the Desert" was produced after an original sketch by expedition artist Charles Koppel (fl. 1853-1865). It was printed as Plate XIII in Volume V, Part II, following page 235, in the "Geological Report by W. P. Blake, Geologist and Minerologist to the Expedition," as part of the “Routes in California, to Connect with the Routes near the Thirty–Fifth and Thirty–Second Parallels, Explored by Lieutenant R. S. Williamson, Corps of Topographical Engineers, in 1853."