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The Devil’s Punchbowl is a scenic geological formation situated along the northern slopes of the San Gabriel Mountains. The punchbowl is characterized by a 300-foot-deep canyon known as a plunging syncline, or a compressed V-shaped fold within the earth’s sedimentary rock.
The San Gabriel Mountains (Spanish: Sierra de San Gabriel) comprise a mountain range located in northern Los Angeles County and western San Bernardino County, California, United States. The mountain range is part of the Transverse Ranges and lies between the Los Angeles Basin and the Mojave Desert , with Interstate 5 to the west and Interstate ...
Gneiss is characterized by large-scale foliation, fracturing, jointing, and blocky shattering. Dikes of anorthosite and associated rocks cut gneiss, and centimeter- to meter-scale fragments of gneiss are scattered through the anorthosite.
The monument covers the central and northern regions of the San Gabriel Mountains, extending west to east from Upper Sand Canyon at Little Tujunga Canyon Road to Telegraph Peak. It contains the Sheep Mountain Wilderness, the San Gabriel Wilderness, and Pleasant View Ridge Wilderness.
May 30, 2012 · About 5-7 million years ago, part of that block began rising as a mountain range along the Sierra Madre and Cucamonga fault zones, creating the San Gabriels and forming an unusual bend in the otherwise orderly line of coastal mountain ranges.
History of the San Gabriel Mountains. Second National Forest in the United States - The first national forest in the State of California and second in the United States, Angeles National Forest was created by proclamation of President Benjamin Harrison on December 20, 1892.
San Gabriel Mountains, segment of the Coast Ranges (see Pacific mountain system), southern California, U.S. The mountains extend eastward for about 60 miles (100 km) from Newhall Pass, north of San Fernando, to Cajon Pass and define the northern extent of the Los Angeles metropolitan area.
