A1, A2: Vista Park Hill, a
push-up ridge
Photo A1, on the left, shows the West side of Vista Park
Hill. This hill is a ``push-up ridge'': the Calaveras fault splits into two
strands here and a wedge of land caught between has been forced up, creating
this rather steep-sided long thin hill.
There is a rather pleasant little park on top, with a nice
view. From the top on a clear day you can see that other small ridges such as
this one occur here and there along the fault trace. These represent other
places where the fault has split into multiple strands, or there is a slight
bend, etc: anything that disrupts the smooth translation of one side of the
fault against the other.
The photo on the right, A2, shows a line of cracks crossing
A3, A4: 164 Locust Street
2004 Photos – 164 Locust St 
Click on 2004 Photos for larger view. (Watch out
for the dogs behind you!)
This house (shown in the photo on the left, A3) sits on top
of the fault and is being distorted by the fault's motion. The photo on the
right, A4, shows a better view of the bent curb North of the house. This photo
was shot twice from (approximately) the same location, in 1966 and 1992. The
1966 shot (and the other two 1966 shots included in this tour) was taken by Dr.
Eduard Berg of the
Also notice the asphalt patches in the street in the newer
photo. Not surprisingly, the pipes in the street break and have to be repaired
every few years or so.
If you are having trouble finding the bend in the curb I
mean, here is an enlargement taken from the 1992 photo above to guide you. The
bend in the curb caused by the fault is in the precise center of this photo.