Mammoth Mountain

Mammoth Mountain (United States) is a lava dome. It rises to 3,369 m above sea level. The GVP records 2 confirmed eruptions in the Holocene, the latest in 1260.

Elevation: 3,369 m
Last eruption: 1260
Confirmed eruptions: 2
Max VEI: 2
Country: United States
Location: 37.63° N, 119.03° W
Region (GVP): Basin and Range Volcanic Province
GVP type: Lava dome(s)
Tectonic setting: Rift zone / Continental crust (> 25 km)
Main rock type: Trachyte / Trachydacite

Show on the timeline GVP entry ↗

Other volcanoes and strong earthquakes within 300 km

Eruption history

VEI – Volcanic Explosivity Index: 0 = lava outpouring, 4 = like Eyjafjallajökull 2010, 6 = like Pinatubo 1991, 7 = like Tambora 1815. The scale is logarithmic – each step is about 10 times more material.

Start	End	VEI	Vent and dating
1260 ± 40 years	—	?	North flank of Mammoth Mountain · Isotopic: 14C (calibrated)
6,540 BCE ± 90 years	—	2	SSW of Mammoth Mtn (Red Cones) · Isotopic: 14C (uncalibrated)

Data: Global Volcanism Program, Smithsonian Institution (#323150)