Strange rock in the desert in California to provide clues to the past earthquake intensity, a new study suggests.
In the red rock canyon, Los Angeles is about 120 miles (190 kilometers) north, tall, rusty spire rock called the stone forest dotted the landscape. Transcendental and free from vulgarity spindle in the form of sedimentary rock, harder to layer protection soft layer below. Erosion wear off less, resistance to rock, leaving thin cap rock, and even more hard rock perched on soft tower. This is California, red rock canyon background provide more than 100 films, from the classical western "Jurassic park scene."
California's second largest strike-slip fault, and rock failure, through the only 3 miles (5 km) north red rock canyon fragile stone forest. (A strike-slip fault is A fracture, the two sides of the earth sliding fault are mostly parallel. About 500 years ago, the recent add rock fault segment happened about 7.5 magnitude earthquake, estimated red rock canyon.
The grand canyon of the stone forest evidence red rock canyon area is near the earthquake strong vibration, according to a study released today (February 4,) in the United States reported to the earthquake. This is good news nearby cities such as Palmdale, California Edwards air force base.
"In fact, they did not break the ground motion, you may be lower than expected, said:" the United States nuclear regulatory commission Abdolrasool Anooshehpoor earth physicist. The research, and Anooshehpoor is a professor at the university of Reno, Nevada.
Need to be aware of
The researchers rely on a big assumption, in determining the past, the effects of the strange rock: stone forest looks almost the same, because they are not 500 years ago.
"This is a big uncertainty," Anooshehpoor said. They have no estimate of how fast the stone forest form, or how long rock has been exposed to the surface. "Basically, we assume that in the past 500 years, the earthquake occurred in the time, because, shape not too big change."
The Anooshehpoor and his colleagues at the university Reno, Nevada, where there is a long-term interests teeter balance rock, or city account rate - huge granite boulders like a child to the top. In southern California, the city account rate is considered to be the evidence, no experience, strong earthquake vibration caused by the formation of rock since.
But near the desert and rock failure lack of granite outcrops form of city account rate, therefore, the researchers looked at another way to measure shaking. "I don't want to say the stone forest is a necessity, but because of its nature, you must be very careful when you use them, they are very fast erosion," Anooshehpoor told OurAmazingPlanet.
Little rock
They chose the two most fragile red rock canyon stone forest in their shape and scanning. A rock samples back to the laboratory and crushing piston tower power to provide the data. Computer simulation shows that the surface of acceleration, or shaking, need to break the stone forest.



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