The Wabuska geothermal area is located at the margin of Mason Valley, in Lyon County, Nevada, where both the valley margin and the thermal springs coincide with a northeast-trending zone of faults referred to as the Wabuska lineament. Hot springs, about 1.6 km north of Wabuska, range in temperature from 59 to 72°C and occur over a large area. Gas bubbles issue from the pools with a faint odor of H2S. The springs occur along an east-west line that coincides with the course of a post-Lahontan fault, which is plainly shown by an irregular scarp, in some places 6 m high.