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Re: Some Pictures Online - Kewl
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Posted by Canie {canie[110AT18]basicso[10DOT181]com} on October 18, 1999 at 11:43:22:
Here are some captions for the Paul "Kip" Otis-Diehl, USMC, 29 Palms photographs that can be found at: http://www-socal.wr.usgs.gov/hudnut/lavic/ >#02 - Looking towards NW across Lavic Lake, rupture passing > from lower right, stepping out toward upper left; > NW end of the surface rupture is in the distance > on the far side of Lavic Lake. > >#03 - cracks on far side of wash > These we call 'en-echelon' breaks where they step sideways > >#04 - splaying of fractures viewed from above > >#05 - Southeast of maximum displacement site. Here we see 3-4 meters > of right-lateral slip have offset a ridge and created a > 'shutter' ridge blocking flow in the dry creek channel. > The white vertical surface is the fault scarp. > >#06 - fractures crossing a wash > >#07 - view right along the main > rupture zone, and also visible is a subsidiary fracture > from lower right corner coalescing with the main break > in the middle distance. > >#08 - View downward onto vehicle tracks crossing the fault at > a high angle. One can see 2.5 to 3.5 meter right-lateral > displacement of the tracks. > >#09 - Fracture running along hillside in low-relief topography > with offset gullies and tracks > >#10 - Ground view along surface rupture, showing the fracturing > of the soil and how pieces have been pushed up within > the fault zone. > >#11 - Subparallel breaks coalesce on face of hill (in shadow) > and form a single rupture heading off to the upper left > >#12 - Downward view onto gullies, gravel bar, and other laterally > offset features. Here slip appears to be about 2 meters > >#13 - rupture cutting across the countryside in loose alluvium > >#14 - breaks cutting alluvium, nicely lit > >#15 - View downward onto site with maximum observed lateral > displacement along the Lavic Lake fault. Here a vehicle > track and dry creek bed are laterally offset by approx. > 370-480 centimeters. The orientation of fractures here > is nearly North-South. Compression locally across the > fault pushed up a 'mole track' where the fault breaks > the dirt road at the right side of the photo. > >#16 - fracture cutting across the countryside > >#17- fracture cutting across the countryside (left to right) such > that fault scarp is lit up by the sun, appearing as a bold > white line > >#18 - 'Mole track' at the max. slip site from the ground > >#19 - view towards south across Lavic Lake, with the surface > rupture running from lower right to upper left. In the > middle distance on the right is an ancient lava flow > >#20 - splayed fractures running through loose alluvium > >#21 - 'apparent' vertical displacement and scarps caused by > mainly lateral slip > >#22 - same as 21
Follow Ups:
● Re: Opps - Credits - Canie 11:46:09 - 10/18/1999 (900443) (0)
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