Keywords: Monument Valley, Arizona LCCN2010630322.tif 1 photograph digital TIFF file infrared Notes The valley's vivid red color comes from iron oxide exposed in the weathered siltstone The darker blue-gray rocks in the valley get their color from manganese oxide ; Gift and purchase; Carol M Highsmith; 2009; DLC/PP-2010 031 ; Credit line Carol M Highsmith's America Library of Congress Prints and Photographs Division ; Forms part of Carol M Highsmith's America Project in the Carol M Highsmith Archive ; Title date and subjects provided by the photographer 2004 Creator Carol M Highsmith Library of Congress Catalog http //lccn loc gov/2010630322 Image download https //cdn loc gov/master/pnp/highsm/04300/04331a tif Original url http //hdl loc gov/loc pnp/highsm 04331 No known restrictions on publication LOC-image highsm 04331 220px PD-Highsmith Images uploaded by Fæ Photographs by Carol M Highsmith |