Re: Yosemite swarm/ Mt. San Gorgonio Ml 3.8
Posted by Don in Hollister on May 23, 2001 at 13:12:39:

Hi All. Some time ago when searching for some data for Petra I came across this. I copied it as I though I might use it later.

I have no idea as to who the author of this article so it is something I would take with a grain of salt.

I suspect there is some validity to it, but not sure as to which parts. Take Care…Don in creepy town.

California has already broken off of Mexico. Cabo San Lucas was attached to the Puerto Viarta area. The Gulf of California has widened substantially due to the numerous volcanic eruptions along this segment of the East Pacific Rise. The mostly granitic Penninsular Ranges, from Cabo San Lucas to San Jacinto have moved northwest and forced weaker Tertiary marine sediments and some older rock sequences to fold and break up (Normal and thrust faults). Most of the western portions of Southern California have already faulted off along the Newport- Inglewood and Malibu Faults, and submerged. All that remains is Palos Verdes and a few Channel Islands. These tectonics have created some spectacular mountain scenery such as Big Bear, great beaches such as Santa Monica and some very rich oil fields, such as Signal Hill...
Just Another Sunny Day!

California has already crashed back in! Yes, Mt. San Jacinto, 11,000 ft. high at Palm Springs, the highest point on the Peninsular Ranges, is like the bow of a huge ship (Stern is at Cabo) that has run aground into Mt. San Gorgonio, also 11,000 feet high and directly across the San Andreas Fault at San Gorgonio Pass. This is one of the world's greatest plate tectonic collision zones. It may also be the most narrowly focused and dangerous. Huge alluvial fans thousands of feet thick have covered the fault zone in many places such as at Indio, Whitewater and Banning. An ancient Persian saying about earthquakes really applies to this area...
"The mountains shall become sand and the sand shall become mountains!"

The fault has become locked up here because of the impact and the geometric difficulty of trying to move such a "Ship" around this bend of the San Andreas Fault. The strain accumulates to tremendously dangerous proportions before it can be relieved catastrophically. The accumulated strain is calculated by taking the estimated annual movement along the other portions of the San Andreas Fault, approx. 4 centimeters per year, and multiplying it by the estimated time since the last quake on the southern section of the fault. 4 cm. X 500 = 2000 cm., or 66 feet! The Alaskan quake, the largest ever recorded, had offsets of 35 feet horizontal and 15 feet vertical...
It was a Richter 9.3

The fault has become locked up here because of the impact and the geometric difficulty of trying to move such a "Ship" around this bend of the San Andreas Fault. The strain accumulates to tremendously dangerous proportions before it can be relieved catastrophically. The accumulated strain is calculated by taking the estimated annual movement along the other portions of the San Andreas Fault, approx. 4 centimeters per year, and multiplying it by the estimated time since the last quake on the southern section of the fault. 4 cm. X 500 = 2000 cm., or 66 feet! The Alaskan quake, the largest ever recorded, had offsets of 35 feet horizontal and 15 feet vertical...
It was a Richter 8.6 !

West of the Salton Sea, the old white calcareous Gulf shoreline along the base of the dark colored Santa Rosa Mtns. is a very distinct warning. The Gulf of California was cut off about 800 years ago by a (Quake related?) shift of the Colorado River Delta, and the Imperial Valley dried up. (The Salton Sea was created by accident during construction of the All American Canal at the Colorado River in 1904, otherwise the valley would still be dry). The megaquake could cause enough liquefaction of the delta, combined with a Gulf tidal wave, to reflood the lower desert. The Salton Sea has many geologic and geothermal features similar to the ones that destroyed Sodom and Gomorrah on the Dead Sea...
Remember, Don't Look Back!


Follow Ups:
     ● Re: Yosemite swarm/ Mt. San Gorgonio Ml 3.8 - Canie  16:52:24 - 5/23/2001  (7664)  (0)
     ● Re: Yosemite swarm/ Mt. San Gorgonio Ml 3.8 - Don in Hollister  15:51:15 - 5/23/2001  (7661)  (0)