Steam was reported to issue from a development drill hole at the New York kaolin deposit in 1963. The drill hole is about 43 m deep, and is located in the vicinity of SW¼ Sec. 1, T25N, R35E. The kaolin deposit is of the shallow, hot-springs type and contains irregular bodies of' associated siliceous sinter. The sinter is exposed at the surface and was encountered during drilling (K. Papke, personal commun., 1977). The sinter and thermal water occur near the mountain front along a fault scarp that cuts the alluvium. This fault is probably part of a young basin-and-range fault shown by Stewart and Carlson (1978) cutting the alluvium in southern Buena Vista Valley. A temperature gradient drill hole (Phillips Petroleum Co. (BV ST No. 1) reported 74.6ºC at 360 m (GeothermEx, 2004, Log NEW00).