Answer Happy

ESCI 110 Faults and Folds 2329 Page 15 128 500meters 1000, maters Figure 1. Topographic Map Showing Wallace Creek, Central California (from SCEC). The map above shows the topography in the central Carrizo Plain where the San Andreas Fault cuts through Central California. The map elevations are in meters. 17. What is the contour interval on this map? (hint. What numbers do you see on the lines?) 18. San Andreas Fault runs across the page and is labeled SAF (San Andreas Fault). Notice that the stream channels are offset along the fault. Is the top part of the fault moving right or left? 19. What type of plate boundary is this? Figure 2. Wallace Creek from the Air (USGS photo).
ESCI 110 Faults and Folds Page 6 13 Vishal Parking A PRE Figure 3. Annotated Carrizo Plain Topographic Map from the Southern California Earthquake Center web site. (The Wallace Creek topographic map was adapted from K. Sieh and R E. Wallace, "The San Andreas fault at Wallace Creek," in Geological Society of America Centennial Field Guide, Cordilleran Section (1987), with the color- coded geomorphology superimposed onto the map by Aron Meltzner, California Institute of Technology.) The rate of movement along the San Andreas Fault can be determined by using carbon 14 dating. Wallace Creek (see photo) originally flowed downhill without a sharp, right angle bend. The banks of the channel at locations 1 and 2 would have originally lined up. Locations 1 and 2 are now 130 meters apart. Wood and charcoal fragments from these locations have been dated using carbon 14 dating, and show that 3800 years ago this channel was connected. 20. Based on this information, what is the average yearly slip rate on this segment of the San Andreas Fault? (indicate units in answer, show your work in the space below) Slip rate: m/yr