South America

http://library.lehigh.edu/omeka/files/original/b09904803d3c7082e3a20d2526101c9f.jpg
Geological map.

Geological Observations on South America. Being the Third Part of the Geology of the Voyage of the Beagle, under the Command of Capt. Fitzroy, R.N. during the Years 1832 to 1836. London: Smith, Elder, 1846.

Shown here in this hand-colored plate in the third volume of Darwin's Geological Observations is a cross section of the Valley of Copiapó on the Chilean coast, looking towards the base of the main cordillera.