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El Mirage, California

From Wikipedia, the free encyclopedia

El Mirage is an unincorporated community in the western Victor Valley of the Mojave Desert, within San Bernardino County, California.

El Mirage is next to the El Mirage Lake, a dry lake bed, and 12.5 miles (20.1 km) northwest of Adelanto.

YouTube Encyclopedic

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  • Geology in the El Mirage Dry Lakebed
  • Labor Day Weekend 2017 @ El Mirage Dry Lake
  • ATV RIDING @ EL MIRAGE,CA

Transcription

Welcome to the El Mirage Cooperative Management Area. This area is managed by the Bureau of Land Management for its unique recreation opportunities. My name is Cynthia Skjerve and I'm a geology intern at the Desert Discovery Center in Barstow. Today we're going to explore a geologic formation in El Mirage that made this area a world-class recreation destination. Because of it's unique flat surface the El Mirage Dry Lakebed is a focal point of the Management Area. Visitors enjoy photography, operating aircrafts, ATVs and competitive land speed runs just to name a few. So have this lakebed get here? That's the question I hope to answer today. So let's head out to the lakebed. During the Pleistocene-Holocene Epoch (over 200,000 years ago) the Mojave Desert was a wetter environment due to the Ice Age. The elevation was around 2,860 feet and the dry lake you see in front of you was actually a lake with a depth of 28 feet. The El Mirage Dry Lakebed was formed due to the movement of two faults located nearby. The San Andres, a right-lateral strike slip fault, meaning the motion of the movement opposite from your position moves from left to right. The Garlock Fault, which is a left-lateral strike-slip fault has the opposite movement. The combined movement from both faults has resulted in the land being stretched. This stretching has created a zone that is relatively flat and free of other features. With the ending of the last Ice Age and continued motion along fault lines, El Mirage was being influenced by the Rain Shadow Effect. Moist air was being forced up over the San Gabriel Mountains where it would cool and lose moisture. The air on the downwind side of the mountain became dry, thus creating our desert environment. The area became increasingly drier and the lake began to dry up. Still remaining, however, was the alluvium in the lakebed. El Mirage Dry Lake was dominated by surface runoff and silt/clay-sized sediments, especially from the Sheep Canyon Alluvial Fan of the San Gabriel Mountains. How did all this alluvium also known as sediment reach the dry lakebed? The steep San Gabriel Mountains, which have been battered by the San Andreas Fault and further eroded by wind and rain since sediment flowing down the mountain stream channels. Once the sediment which is the bottom of the mountain where it flattens onto the desert the sentiment spreads out into the shape of a fan, thus the named alluvial fan. Today development in the San Gabriel Mountains and El Mirage area has diverted important sediment away from the lakebed which helps replenish its hard surface. Driving and doing spins on the lakebed when it's wet or muddy breaks up the surface of the clay, and creates huge ruts which will take years to mend. For this reason, the lakebed is closed to vehicle travel when the lakebed is wet or muddy. Helping the BLM preserve the integrity of the El Mirage Dry Lakebed by staying off it when it's wet and not breaking up the surface when it's dry will ensure its existence for the use and enjoyment of future generations.

Contents

Education

El Mirage School, a K-8 Campus, is operated by neighboring Adelanto Elementary School District. Students in the upper grades attend High School in Victor Valley Union High School District, including Adelanto High School.

Filmings

The music video for the song "Dilly" by Band of Horses was filmed in 2010 at Murphy's Bar and Grill, now permanently closed.[2]

See also

References


This page was last edited on 1 July 2018, at 16:29
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