Everything about The San Francisco Volcanic Field totally explained
The
San Francisco volcanic field is an area of
volcanoes in northern
Arizona,
USA. The field covers 1,800 square miles (4,700 km²) of the southern boundary of the
Colorado Plateau. The field contains 600 volcanoes ranging in age from less than 6 million years old to less than 1,000 years, of which
Sunset Crater is the youngest. The highest peak in the field is
Humphreys Peak which is
Arizona's highest peak at 12,633 feet (3,850 m).
Humphreys Peak is a part of the
San Francisco Peaks an extinct stratovolcano complex near
Flagstaff, Arizona.
The volcanic field seems to have formed from a geological
hotspot, a hot area in the mantle. As the
North American plate moves over the spot, new volcanoes appear. Thus, the newest volcanoes are at the east side of the field. Most of the volcanoes are
basalt cinder cones, but there are also large
lava domes consisting of
rhyolite and
dacite.
Given that
Sunset Crater is such a young volcanic feature of this area and that eruptions have occurred every several thousands of years in frequency, it's likely that there will be a future eruption in the San Francisco Volcanic field. However, it's impossible to predict when and exactly where a new eruption might occur. The
USGS (United States Geological Survey) does say that a future eruption would most likely be in the eastern side of the volcanic field, where the most recent volcanic activity has occurred. Such an eruption is likely to be small and pose little or no hazard due to the remoteness of the area.
The volcanic field isn't near
San Francisco, California and shouldn't be confused with that city.
Notable Vents
External link and source
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