![]() ![]() For example, in the Grand Canyon, about 200 miles east, the underlying rock unit is the Vishnu Schist, dated radiometrically at about 1.7 billion years and the overlying horizontal sedimentary layers are 100 to 400 million years older than the Santa Monica Slate. ![]() In contrast, the oldest rock underlying most of North America is 5 to 10 times older. The Santa Monica Slate is the oldest rock unit in the Santa Monica Mountains, formed during the Jurassic Period, about 220 to 250 million years ago, during the age of dinosaurs. The rock was derived from mud deposited in an offshore marine basin, which was later mildly metamorphosed by burial, heating and deformation. In the long canyon south of the crest, the underlying mud-colored rock is named the Santa Monica Slate, visible at a few exposed cliffs in the canyon. We will start our virtual tour of the Santa Monica Mountains at the most visited location - Sepulveda Pass, where the I-405 freeway crosses between Westwood and San Fernando Valley. Stop 1: Santa Monica Slate at Sepulveda Pass Evidence for the rotation includes the distribution of Sespe Formation conglomerate clasts, described at Stop 4 below, plus paleomagnetic measurements showing that magnetic minerals in volcanic and sedimentary rocks that aligned with the Earth’s magnetic field when deposited no longer point in that direction. This event has been named the Incredible Miocene Rotation, and is shown below. As a result, a continental fragment now forming the Santa Monica Mountains, northern Channel Islands, and Santa Ynez Mountains, was slowly rotated about 120 degrees away from the present coast from Orange County to San Diego. Some discussion of Orange County is necessary to understand the geologic history of the Santa Monica Mountains.Ībout 18 million years ago, descent of an oceanic tectonic plate under North America was replaced by sideways translational motion on the proto-San Andreas Fault. The tour guide refers also to surrounding areas, especially Orange County, because the two areas were once adjacent. This virtual tour describes geologic features of the Santa Monica Mountains, with seven “stops” covering about 200 million years of geologic history. LA/SMM Chapter of CA Native Plant Society Introduction Performances included “Macbeth,” “King John,” “Mornings at Seven” and more.GEOLOGY TOUR OF THE SANTA MONICA MOUNTAINS Over the years, she appeared in numerous plays around Southern California, including ones at San Diego’s Old Globe and L.A.’s Ahmanson and Mark Taper. ![]() Her last TV gig was on “Picket Fences,” when she was 85. Law,” “Little House on the Prairie” and the list goes on. In TV, she appeared in “Quantum Leap,” “Falcon Crest,” “L.A. Other parts included ones in “The Sting,” “The Executioner’s Song,” “Jaws II,” “Flatliners,” “Topaz,” “A Man Called Horse” and “Somewhere in Time.” ![]() She graduated from the American Academy of Dramatic Arts in New York and eventually made it to Broadway, appearing in Kaufman and Hart’s “Merrily We Roll Along.” In between East Coast plays, she busied herself with radio work and as a photographic stylist for McCall’s, Collier’s and Ladies Home Companion.Īfter returning to California, the weaver and potter, who later was also an art teacher, made her own puppets and toured Southern California putting on her self-written puppet plays eventually she also wrote a book titled “Presenting Marionettes,” still available in some libraries.ĭuring WWII, she and her sister became riveters at Douglas Aircraft, where she was also among a group of workers who started up a theater group to boost morale.Īfter the war, she returned to thesping and appeared in her first film, “The Impossible Years,” in 1958. Surrounded as she was with showbiz, it wasn’t unexpected that she would catch the acting bug. It wasn’t until years later, her granddaughter Laura Scott said, that French found out her protective father had turned to Rogers and said, “Under no circumstances is my daughter to be allowed to ride” on the polo team.) (An accomplished horse rider, she even tried out for polo at Will Rogers’ polo grounds, did well, yet wasn’t accepted, and she couldn’t understand why. ![]()
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