![san andreas fault line map san andreas fault line map](https://dabrownstein.files.wordpress.com/2013/02/california-in-usgs-map-of-faultlines.jpg)
At ground surface above such an area, there may not be the nice split where one side slid one way, and the other side slid to the opposite direction - there could just be an acre, or a few, where the dirt looks so torn up you might mistake it for human-dug dirt piles.
The fault trace - the fault as it's mapped at ground surface - frequently gets a "braided" appearance from parallel smaller faults that meet and split, and cross, and meet again, but because they are so much smaller in length and have the same direction of movement as the "main" fault, they aren't usually recognized on their own. Keep in mind: a fault, especially a huge regional fault like the San Andreas or San Jacinto, is not really just one line in most parts. In heavy winters or water years during the Spring and Summer, a lot of springs would popup on the South Road of the circle along a visible line and they had to be diverted between the cabins, including ours, located off the North Road of the circle, indicating to me we were on solid Rock and you could see the physical fissure, per say running through the Circle. (Sag ponds are obvious signs of the fault, such as Lost Lake, Twin Lakes, Robin Circle, Wright's Lake, Jackson Lake, etc.) Growing up in the 60's, the West side of the center of the circle always had a running spring, creating a marsh with standing water where we would spend hours catching pollywogs and frogs. Robin Circle is shown as being mostly a sag pond or lake, similar to Wright's Lake but smaller, on the maps of the 1920's. Mind you a fault line is not a line per say but can be hundreds of feet wide. Not sure how he knew that or where he got that information. We had a surveyor or a geologist back in the early 60's tell us that the fault ran right along the back of our property and that we were in the "grey" zone. Our property was bought in 1940 and from the geology and geological events that have taken place over the decades I truly believe the line goes right through the South side of the middle of the circle. I can say with pretty high confidence that the above map is VERY accurate for the portion of the line that goes through Robin Circle between Spruce and Acorn. It has significant gaps on its trace, and appears to be based on aerial observation.ĭoes anyone out there know of other maps I could consult that would provide a street-level detailed trace of the fault?
![san andreas fault line map san andreas fault line map](https://d3i71xaburhd42.cloudfront.net/eef36a0da92b81fdd5fe9425e8fc392da131a25f/3-Figure3.4-1.png)
The CA Geological survey has a non-interactive map here: and. The CIT map may be an improvement, and it seems to place the fault slightly more northward than the other maps. This seems to have rather low fidelity, given that the line is just a straight-line trace between a few known points of the fault, which are miles apart. The one that most folks are familiar with is. There are, unfortunately, discrepancies when one compares these maps, so it is difficult to know with confidence precisely where the fault line is. I've been looking at several different online resources to find a detailed trace of the San Andreas Fault going through Wrightwood.