Grand Canyon National Park, Arizona. The Cinder Cone near the foot of
Toroweap.
USGS Earth Science Photographic Archive digital file: hjk00905
Vulcans Throne (elevation 5,102 feet) is a volcano of Quaternary age on
the North Rim of the Grand Canyon just southwest of Toroweap. Vulcans Throne and other volcanoes along this section of the canyon produced
lava flows that poured into the canyon many times in the past. Some of these
event created natural dams that intermittently created natural great lakes
in the canyon. Between volcanic eruptions and flows the river erosion would
reclaim the canyon. This photograph shows one of the lava flows from Vulcans Throne near the edge of the canyon. Lava Falls (about 2 miles downstream
from Toroweap) is a rapid that runs over remnants of ancient lava flows
that flooded the canyon. Most of the volcanoes occur along the trace of
the Toroweap Fault, a north-to-south-trending fault zone that crosses the canyon
just west of the Toroweap overlook area. |