Geologic Trip, Mammoth Area
Hot Creek Gorge
There are many hot springs and geothermal areas in the Mammoth and Mono Lake areas. Most of these were formed when surface water or groundwater from the eastern slope of the Sierra Nevada was heated by magma at shallow depths. One of the best known of these geothermal areas is Hot Creek Gorge, which lies within the Long Valley Caldera. The gorge formed when a part of the caldera floor was uplifted by volcanic activity. The creek flowed through this area prior to uplift, and the gorge was cut as the creek maintained its established course during uplift.