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Unformatted text preview: 1 EXERCISE #5 LAB GEOLOGY 240 MATERIALS NEEDED: calculator, ruler, colored pencils, scissors, tape, graph paper PALEOSEISMOLOGY and EARTHQUAKE PREDICTION PART I. The Death Valley Fault Reference: Frankel, K.L., and 10 others, 2007, 10Be and 36Cl geochronology of offset alluvial fans along the northern Death Valley fault zone: Implications for transient strain in the eastern California shear zone: Journal of Geophysical Research (Solid Earth), doi:10.1029/2006JB004350. Eastern California Shear Zone/Northern Death Valley Fault Zone The eastern California shear zone is a series of faults east of the San Andreas fault that together accommodate approximately 20% to 25% of Pacific-North America plate boundary deformation. This zone of active deformation extends from the southern Mojave desert, near Palm Springs, northward into western Nevada, near Lake Tahoe. The northern Death Valley fault zone is thought to accommodate much of the slip related to Pacific-North America plate motion in the eastern California shear zone. A number of recent GPS surveys have shown that over the past ten years, the northern Death Valley fault zone has been taking up 3 to 8 mm/yr of the approximately 9 to 12 mm/yr of relative plate motion east of the San Andreas fault. Geologists are currently trying determine longer-term geologic slip rates on this fault zone. The following exercise uses real data from this research to quantify the type, amount, and rate of fault slip on this important fault system. USE THE PAPER MAP (last page of handout) AND COLOR FIGURE . 1. How much slip, in meters, has occurred on this fault? __________meters To answer this question-- cut your map along the Death Valley Fault. Using the deep stream channels as a guide slide the two sides until the major deep channels line up. Then measure (note scale on the map in meters) how much you moved the paper. Use Color Figure as visual aid (notice the channels)....
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