Transforming California Landforms of the San Andreas Fault
Images & text by Thomas McGuire, Cave Creek Digital, Cave
Creek, AZ [email protected] If we intend to live on this
planet we truly need to understand how it works. Slide 2 Exploring
ways to find fault Slide 3 3 The author at Parkfield CA, site of
USGS seismic experiment. Be here when it happens! Slide 4 4 Fault
Issues 1. Fault Scarps & Alignments 2. Sag Ponds 3. Offset
Drainages 4. Distortion of Human-Made Structures 5. Infrastructure
Vulnerability Slide 5 5 Basic California Geography Imperial Valley
Los Angeles Mojave Desert San Joaquin Valley San Francisco San
Andreas Fault Death Valley Slide 6 6 San Andreas Lakes viewed from
the south near San Jose Slide 7 7 The San Andreas fault is part of
the boundary between the North American and Pacific tectonic
plates. It is classified as a right lateral transform fault. (To a
person facing the fault, the far side shifts to the right.) Our
Dynamic Earth, Robert Tilling, USGS, 1996 Slide 8 8 The Sea of
Cortez.. (Known to Gringos as The Gulf of California.) Slide 9 9
The US-Mexican Border (fence line) is as impervious to plate
processes as it is to immigration. Slide 10 10 The All-American
Canal brings Colorado River water to the Imperial Valley of
California. Slide 11 11 Wind Farm north of Palm Springs near San
Gorgonio Pass. Slide 12 12 The main trace of the fault runs NE of
Los Angeles, but numerous splay faults affect the LA Basin.. (So
does smog.) Slide 13 13 California Aqueduct at Palmdale, north of
Los Angeles. Slide 14 14 Gates along the California Aqueduct at
Palmdale Slide 15 15 San Andreas Fault road cut, CA 14 at Palmdale,
Slide 16 16 Detail of CA 14 road cut at Palmdale Slide 17 17
Intersection of the San Andreas & Garlock Faults east of Tejon
Pass. Slide 18 18 John Marquis, USC The San Andreas and Garlock
Faults Slide 19 19 Remains of Manzanar Japanese American internment
Camp (WWII) and the steep eastern front of the Sierra Nevada
Mountains Slide 20 20 Columnar jointing in basalt at Devils
Postpile near Mammoth Lakes, CA Slide 21 21 Top of jointed basalt
columns, Devils Postpile, CA Slide 22 22 Dantes View, Death Valley,
CA. Badwater, at -282 Ft, the lowest place in the Western
Hemisphere, is at the bottom right. Slide 23 23 Slide 24 24 San
Andreas Fault, Carrizo Plain just north of CA 166. Slide 25 25
Fence (see last slide) crosses San Andreas Fault near CA 166. Slide
26 26 San Andreas Fault ridge, Elkhorn Scarp along the base of the
Tremblor Range, Carrizo Plain, CA Slide 27 27 Fault trace, Carrizo
Plain, CA Slide 28 28 San Andreas Fault, Carrizo Plain, CA Slide 29
29 Stream offset along the San Andreas Fault, Carrizo Plain, CA
Slide 30 30 Soda Lake, Carrizo Plain,. A closed drainage (sag pond)
feature. Slide 31 31 Wallace Creek, USGS aerial view, about 1990
USGS Photo Slide 32 32 Wallace Creek fault investigation area on
the Carrizo Plain. Numbers show signed posted nature trail
features. Next image at #1.. Slide 33 33 Tom at Wallace Creek fault
offset. Slide 34 34 Stream offset along the San Andreas Fault near
Wallace Creek, CA Slide 35 35 Stream offset north of the Carrizo
Plain, on Bitterwater Road. Slide 36 36 Sag pond, San Andreas Fault
along CA 25. Slide 37 37 San Andreas cable crossing & sag pond,
CA Route 25. Slide 38 38 Sheared tree limbs along CA, Route 25 ; )
Slide 39 39 San Andreas Fault trace, CA Route 25. Slide 40 40
California Route 25 along the San Andreas Fault. Slide 41 41
Pressure Ridge, California Route 25. Slide 42 42 San Andreas fault
scarp & sag pond just east of California Route 25. Slide 43 43
Slump structure near the San Andreas Fault, California Route 25.
Slide 44 44 Parkfield, CA. USGS seismic experiment center. Slide 45
45 Laser triangulation and GPS site, Parkfield, CA Slide 46 46
Bridge across San Andreas Fault at Parkfield Slide 47 47 San
Andreas Fault right lateral offset at Parkfield Bridge Slide 48 48
San Andreas Fault Movement, DeRose Winery, Hollister, CA Note the
new building at the top left. Slide 49 49 28 years of offset at the
Cienga Winery, USGS Photo TMcG Slide 50 50 New construction &
fault trace, June 2003, DeRose Cienga Winery. The offset ditch runs
barely out of sight on the right. Slide 51 51 San Andreas fault
creep damage De Rose Cienga Winery, south of Hollister CA Slide 52
52 Town of Hollister, California viewed from the Calaveras fault
scarp. The San Andreas fault runs sub-parallel l,.5 miles west.
Slide 53 53 Wall on 6th Street distorted by Calaveras Fault creep
(June 2003) Slide 54 54 Rotational Translation on 6th Street Slide
55 55 Offset curb, 6th Street Hollister Slide 56 56 Offset curb
on,7th Street Slide 57 57 Roof damage, Hollister High School Slide
58 58 Discrepant Event, Hollister ; ) Slide 59 59 5th Street,
Hollister. Slide 60 60 5th Street Detail #1 Slide 61 61 5th Street
Detail #2 Slide 62 62 5th Street Detail #3 Slide 63 63 4th Street
front steps.. Slide 64 64 Displaced sidewalk, 359 Locust Avenue,
Hollister Slide 65 65 Retaining wall, 359 Locust Avenue, Hollister.
Slide 66 66 Locust Avenue Garage & power pole. Garage built in
1929 Slide 67 67 Locust Avenue Curb & utilities Slide 68 68
USGS, Menlo Park (Bay Area) Research Center Slide 69 69 The San
Andreas Fault passes a few kilometers west (left) of the Golden
Gate Bridge. San Francisco Tourism Photo Slide 70 70 Bye bye to the
fault! (Point Reyes) Slide 71 71 Seismology & economics
converge Slide 72 72 Th e En d. USGS map California Transformed
