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Moonscape to Fault Zone

Saturday, October 16, 2010

JOIN US AS WE TRAVEL through the recently opened portions of the Big Tujunga Canyon and Angeles Crest Highway to see the area burned by the 2009 Station Fire, and explore the geology of the San Gabriel Mountains. We will see the oldest rocks in the southwestern U.S. (over 1.7 billion years old), plus the evidence of billion-year-old magma chambers that have the same composition as the moon rocks, and other huge magma intrusions that cooled during the age of dinosaurs. In the eastern San Gabriels, we will see rocks that were crushed and transformed when the western part of the range was pushed up and over the eastern part. We will come down off the summit to follow the valley of the San Andreas Fault to the west, and see the huge landslides at Wrightwood, the sandstones of the Devil’s Punchbowl folded due to the immense pressures of the San Andreas Fault, the sag pond of Jackson Lake which filled the valley with water trapped along the fault, and the spectacular cliffs (and famous movie location) of Vasquez Rocks, which is over 20,000 feet thick and tilted and rotated over the past 20 million years.

Tour includes charter bus, picnic lunch, snacks and water, lectures, park admissions, and a guide booklet. Your trip fee also includes a tax deductible $32 donation to the Skeptics Society.

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