Figure 8. Deuterium and oxygen‑18 in water samples collected September 2007 from Cave Springs, a permanent pool in Lehman Caves, and two nearby springs, Great Basin National Park, Nevada, in relation to precipitation collected from Cave Mountain, Connors Pass, and Mount Moriah in neighboring mountain ranges between April 1991 and June 1997. Delta deuterium and oxygen‑18 values from precipitation are from Friedman and others (2002). Locations of precipitation sites are shown in figure 1 and water sampling sites are shown in figure 2.