Kerr (1940, p. 1396) described a hot spring with extensive tufa deposits in the vicinity of Sulphur Spring (SE¼ NW¼ S 34, T35N, R41E). However, Flynn and others (1982) reported that extensive tufa deposits are not present at Sulphur Spring, and the temperature of the spring, which issues from a prominent northeast-striking fault scarp, is only 18°C. However, botryoidal and globular travertine was found along a fault zone in Paleozoic Pumpernickel formation about 1.6 km northeast of Sulphur Spring (Flynn and others, 1982). This travertine is probably the sinter area referred to from this area by Trexler and others (1982, p. 31). The Kemp thermal anomaly (Flynn and others, 1982; Trexler and others, 1982) is a geothermal area with no surface manifestations located near the Kemp triangulation station about 1.4 km east of Sulphur Spring. The Kemp triangulation station is located in the NW¼ SE¼ Sec. 34, T35N, R41E (Brooks Spring 7.5-minute Quadrangle). The Kemp anomaly was located by two-meter temperature probe survey. A gradient drill hole encountered 68-70°C fluids that probably flow in gravel and sand above bedrock at 60-90 m depth. Gravity data suggest the hot water may have its source in a concealed fault about 0.5 km to the west (about 1.2 km east of the prominent fault that bounds Edna Mountain on the east (Flynn and others, 1982).