2000 SCEC Intern Field Trip (Page 5)

SCEC INSTANeT News

2000 SCEC Intern Field Trip (Page 5)

Comments from the Interns on the Colloquium and field trip:

Tracy Pattelena
Overall, I really enjoyed the field trip! I had never been to the see the San Bernardino segment of the San Andreas and hadn't had much field experience with the Mojave segment. I have always been very interested in the San Andreas so I really got alot out of this field trip. And having Doug Yule in our vehicle was a plus! He pointed out where the fault was in relation to the road the entire way from Wrightwood to Pallet Creek, which really gave me some insight as to topographic features associated with this type of fault. Visiting the trenches was informative, although I found some of the visits somewhat drawn out with the long "charcoal dating" discussions and arguments among some of the other visiting geologists. Doug Yule and Tom Rockwell, though, were very helpful in interpreting what was being discussed and its importance. That is really important for undergraduates because we often have no idea what we are looking at yet even though we may have already covered the material in class. It was good to see the various sedimentary conditions one can encounter when doing trench work.And the James Reserve was the nicest research station I have ever stayed at!

Several interns seek shade while waiting for a tow truck. Just two minutes after leaving the James Reserve on Sunday morning, Doug Yule's Suburban died. We had just enough room for him and his two dogs in the two other vehicles to continue the trip.
A victim of the 1857 Fort Tejon earthquake on the San Andreas fault, this tree near Wrightwood had it's top snapped off, causing lower branches to grow vertically. Tree-ring dating has been used by Dr. Kerry Sieh (Caltech) to accurately date past earthquakes.

View from above the exposed trench wall at Pallett Creek. Here the interns were joined by Dr. Jim Brune (Univ. of Nevada, Reno), Dr. Craig Nicholson and others from UC Santa Barbara.
Doug Yule explains the trench at Pallett Creek to the group. This trench is considered the "Rosetta Stone" of trenches since it showed evidence for over 2000 years of earthquakes along this section of the San Andreas, including the most recent in 1857.

Dr. Jim Brune explaining one of the many sites where precariously perched rocks are found and measured. The force needed to tip over the rock can be determined, and if the rock has not tipped than it can be assumed that the required force has not been experienced at this location since the rock has been poised to tip over.

Further explanation by Jim Brune.

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	SCEC INSTANeT News
	2000 SCEC Intern Field Trip (Page 5)

Several interns seek shade while waiting for a tow truck. Just two minutes after leaving the James Reserve on Sunday morning, Doug Yule's Suburban died. We had just enough room for him and his two dogs in the two other vehicles to continue the trip.	A victim of the 1857 Fort Tejon earthquake on the San Andreas fault, this tree near Wrightwood had it's top snapped off, causing lower branches to grow vertically. Tree-ring dating has been used by Dr. Kerry Sieh (Caltech) to accurately date past earthquakes.
View from above the exposed trench wall at Pallett Creek. Here the interns were joined by Dr. Jim Brune (Univ. of Nevada, Reno), Dr. Craig Nicholson and others from UC Santa Barbara.	Doug Yule explains the trench at Pallett Creek to the group. This trench is considered the "Rosetta Stone" of trenches since it showed evidence for over 2000 years of earthquakes along this section of the San Andreas, including the most recent in 1857.
Dr. Jim Brune explaining one of the many sites where precariously perched rocks are found and measured. The force needed to tip over the rock can be determined, and if the rock has not tipped than it can be assumed that the required force has not been experienced at this location since the rock has been poised to tip over.	Further explanation by Jim Brune.