HARTMAN MULTIMEDIA
Nature Based Multimedia Information Systems
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HARTMAN MULTIMEDIA
Nature Based Multimedia Information Systems |
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Lower Lone Pine Lying with the San Andreas Rift Zone, this canyon, a
major physiographic feature running virtually straight for nearly 20 kilometers
(12 miles), is probably a fault-line valley, i.e., it was developed by the
erosion of the soft, crushed material in the fault zone. There are a number of distinctive fault-associated
features, including a large sag pond, Lost Lake, near the mouth of the canyon.
There are scarps on both the north and south sides of the pond, which is
thus a part of a sunken block between the two lines of disruption.
A small, intermittent stream, just below Lost Lake, is offset by the
fault. Numerous small scarps 1 to
1.5 meters (3-5 feet) high can be found in the lower part of the valley on the
southwestern side. In the highway cuts in Cajon Canyon the actual fault
zone can be seen as a wide gouge zone in which the rocks have been thoroughly
crushed and weathered. On the northwest side of the Lone Pine Canyon Creek are
excellent exposures of Cajon beds of Miocene origin which are rich in Barstovian
and Hemingfordian mammalian fauna. Integrity: The
southern end of the canyon has been altered by transportation developments but
much of the remainder shows the geological features. Use: Research,
educational, observational. Some
private. December 1976
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