Jemez Volcanic Field

SUMMARY

Type: ash-flow volcanic complex
Activity: extinct
Last Eruption: about 150,000 yrs B.P.
Rock Type: basalt to rhyolite
Eruptive Volume: 2,000 cu km
Location Map from Xerox PARC
Latitude: 35.87 N
Longitude: 106.57 W

Geologic Background:

At the summit of the Jemez Mountains (west of Santa Fe, New Mexico) is the Valles Caldera. This caldera (22 km in diameter) is the source for the well known Bandelier Tuff which was erupted during two major eruptions 1,450,000 and 1,120,000 years ago. Activity in the Jemez Volcanic Field began about 13,000,000 years ago

Historic Activity:

• None

Recent Activity:

• None

Data Sources:

• Volcanoes of North America - Wood and Kienle

ADDITIONAL INFORMATION

Last Update: 1/7/01