Surface Materials and Terrain Features of Yuma Proving Ground (Laguna, Ariz-Calif, Quadrangle)

Abstract : Distribution and slope gradients of surficial materials in the Laguna (Ariz-Calif) 1:62,500-scale quadrangle were mapped in the field for engineering evaluation of vehicle testing suitability and for comparison of Yuma Proving Ground terrain with that of other world deserts. Occurrence and topographic expressions of seven alluvial and six bedrock mapping units are shown as an overprint on the topographic map. Cumulative frequency curves of slope and relief describe these factors of alluvial terrain quantitatively. Actual field measurements of 30,000 feet of traverse are included to permit interpretation for specific materiel evaluations.