CHALK DRAW. Chalk Draw originates in Chalk Valley between Elephant Mountain and the Del Norte Mountains, about twenty-eight miles south-southeast of Alpine in north central Brewster County (at 30°02' N, 103°29' W) and runs south-southeast for thirty-eight miles. It skirts the west side of Santiago Peak, where it is joined by Calamity Creek, then parallels the western base of the Santiago Mountains to its mouth on Nine Point Draw, north of the Rosillos Mountains (at 29°36' N, 103°14' W). The course of the draw runs over Quaternary alluvial deposits derived from underlying Cretaceous limestones and from surrounding Tertiary igneous formations, such as those which form the Santiago Mountains. Chalk Draw drops from an elevation of 4,400 feet above sea level to about 2,670 feet. The area was once predominantly a semiarid grassland with abundant animal life, but overgrazing beginning at the close of the nineteenth century virtually destroyed this former biological community. In the 1980s the terrain was dominated by Chihuahuan Desert scrub, and the draw appeared to be an avenue for scrub encroaching into the remaining grasslands of the higher, more northern mountains. Large areas had been reduced to barren hardpan that would not support even creosote bush.
The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this article."CHALK DRAW," Handbook of Texas Online (http://www.tshaonline.org/handbook/online/articles/rbcpn), accessed May 24, 2013. Published by the Texas State Historical Association.