WALLACE CANYON. Wallace Canyon, a valley with an intermittent stream, begins a mile east of Farm Road 1024 in central Val Verde County (at 30°05' N, 101°18' W) and runs southeast ten miles to the Devils River one mile northwest of Sycamore Canyon (at 30°02' N, 101°11' W). Its path sharply dissects massive limestone that underlies flat terrain, forming a rugged and winding canyon. Wash deposits of sand, gravel, and mud cover the canyon floor. Generally dark, calcareous stony clays and clay loams support oaks, junipers, grasses, and mesquites.
The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this article."WALLACE CANYON," Handbook of Texas Online (http://www.tshaonline.org/handbook/online/articles/rkw03), accessed May 23, 2013. Published by the Texas State Historical Association.