Two lake-filled maars
, Soda Lake and Little Soda Lake, lie northwest of the town of Fallon. The basaltic
maars were formed subaerially
, post-dating the Pleistocene
glacial Lake Lahontan, and were estimated to be less than 10,000 years old and perhaps even less than 1,500 years old (Garside and Schilling, 1979; Price and LaPointe, 1998). The larger maar
, Soda Lake, is about 1.3 x 2 km (0.8 to 1.2 mi) wide and is elongated in a northeast to southwest direction. The 300 m (about 1000 ft) wide Little Soda Lake lies south of Soda Lake. The late-Pleistocene Upsal Hogback cones lie to the north-northeast of Soda Lakes. The maars are the site of a geothermal prospect that may have discharged hot springs through the end of the 19th century.
Nevada, Churchill County
Most recent eruption: