[ Post a Response | San Gorgonio Backcountry Bulletin Board ]
Posted by FIGHT ON on August 15, 2009, 18:52:12, in reply to "Re: Benchmark on SG peak? "
208.127.88.205
Was I supposed to leave that round thing on the top? 
It's the San Andreas Fault. http://geology.com/san-andreas-fault/
Geologists believe that the total accumulated displacement from earthquakes and creep is at least 350 miles along the San Andreas fault since it came into being about 15-20 million years ago. Studies of a segment of the fault between Tejon Pass and the Salton Sea revealed geologically similar terranes on opposite sides of the fault now separated by 150 miles, and some crustal blocks may have moved through more than 20 degrees of latitude.
--Previous Message--
: I hope there's not too much relative
: motion! Isn't that the San Jacinto
: Fault that runs between the two
: peaks? Weren't they recently
: reporting about swarms of
: micro-earthquakes on the fault, and
: wondering if they were possibly
: useful in the prediction of major
: earthquakes?
:
: z
:
: --Previous Message--
: My mistake, it is University of Az.
: However, according to the abstract
: on the website
:
: (http://www.geo.arizona.edu/pdf/GeoDaze_2009.pdf)
: the GPS unit is directly over the
: benchmark. There is another unit on
: the peak of Mt. San Jacinto as well.
: Students are studying the relative
: movement of the 2 peaks.
: Very interesting!
:
: --Previous Message--
: There was a standard brass benchmark
: up there, but the boulder it was on
: rolled over. There is a very small
: black-colored one up there (about
: 1.5" across) just southwest of
: the old phone box used as a
: register. I tried to get a picture
: of it this past June but its too
: small to focus on without a macro
: lens.
:
:
:
: --Previous Message--
: I was just up there on Thursday, and
: also couldn't find the marker.
:
: There was a spot on one of the
: boulders that looked like it had a
: bolt, and two holes that looked
: about 4-5 fingers apart. Is that
: where one HAD BEEN? Did someone
: STEAL the summit marker?
:
: The equipment at the summit, I
: thought it said University of
: Arizona and someone was there
: checking on it when we at the summit
: but we didn't get a chance to ask
: any questions (we were recovering in
: one of the wind shelters at the time
: ;-)
:
: -az-
:
: --Previous Message--
: Just at S.G. Couldn't find a
: benchmark! I heard there's supposed
: to be 2! Does anyone know what the
: instrumentation (UC Santa Cruz)is
: about?
:
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