HARTMAN MULTIMEDIA
Nature Based Multimedia Information Systems
|
HARTMAN MULTIMEDIA
Nature Based Multimedia Information Systems |
|
|
Amboy Crater is probably the best example of a volcanic
cinder cone in the California desert region.
As it last erupted about 6,000 years ago, the flows are still quite
fresh. Basaltic block lava, pahoehoe
(smooth, ropy surfaced lava), cinders and
bombs comprise the cone. Many of the
latter are 15 centimeters (6 inches) to 30 centimeters (12 inches) in diameter. The crater rises some 85 meters (285 feet) above the
desert floor. Surrounding it are
extensive lava flows that have formed huge bubbles which, upon cooling,
split. Occasionally the older desert
alluvium can be observed at the bottom of these cracked blisters.
In some areas there are tunnels in the lava. Integrity: The
area is undeveloped and easily visible from old highway 66. Use: Research,
educational. A portion of the cone
is privately owned. Ref: Parker,
R. B., 1963. Recent volcanism at
Amboy Crater, San Bernardino County, California. California Division of Mines
& Geol. Spec. Report No. 76, 23 pp. April 1975
|
|
Send mail to naturebase@aol.com with
questions or comments about this web site.
|