Title: Geological map of the United States compiled for the 9th census
Creator: Charles Henry Hitchcock [1836-1919] and William Phipps Blake [1826-1910]
Description: Geological map of the contiguous United States at a scale of 1:5,000,000
Date: 1872
Format: Geological map
Image reference: 07-86
Original size: 54 x 84 cm.
Recommend print size: Up to 40 x 27 inches (100 x 70 cm.)