COLORADO CANYON. Colorado Canyon, through which the Rio Grande flows at the United States-Mexico border, begins south of Tapado Canyon (at 29°20' N, 104°03' W) and runs southeast of Farm Road 170 to a point west of Santana Mesa entirely within extreme southern Presidio County (at 29°18' N, 103°58' W). The canyon has rugged terrain with high relief surfaced by shallow, stony soils that support scrub brush, sotol, cacti, and sparse grasses.
The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this article."COLORADO CANYON," Handbook of Texas Online (http://www.tshaonline.org/handbook/online/articles/rkc08), accessed December 05, 2013. Published by the Texas State Historical Association.