San Joaquin
4. Patterson Bend (Kerckhoff Reservoir to Kerchoff #1 PH)
I don't know what kind of rock these cliffs are made of, but there is quite a bit of it along the first 3 or 4 miles of the run. It looks like it has layers in it, so I think it is a metamorphic rock of some sort. The streambed for most of the reach is granite, but in this first section, this rock sort of alternated with the granite. Sometimes this stuff was on both sides of the river, sometimes granite was on the left and this stuff was on the right. If I find out what it is, i will update this description.
Paul Martzen
Patrick Martzen
n/a