MARSCHALL CREEK. Marschall Creek rises just south of the Mason county line in northern Gillespie County (at 30°25' N, 99°00' W). Intermittent in its upper reaches, the stream runs northeast for seventeen miles to its mouth on Hickory Creek, one mile west of House Mountain in Llano County (at 30°35' N, 98°56' W). The creek rises in limestone hills on the eastern edge of the Edwards Plateau and crosses an area of the Llano basin characterized by flat to rolling terrain and soils consisting primarily of deep to shallow sandy and clayey loams. Vegetation consists primarily of scrub brush, grasses, and open stands of live oak and mesquite.