Stevens Canyon Land Slide, Tectonic Block?, Part 2

A return visit to the bottom of the landslide area below Stevens Canyon Road / Canyon Trail.

The week before, I ventured into the depression between the canyon slope and the ridge above the landslide. This time, I wanted to return to the base of the block along the creek. This is where this block is in contact with the rocks of the North American plate. There seems to be a section of weak rock along the NE side of the canyon and this tectonic block is pushing into that, forcing the creek to erode into that side of the canyon. Over time, that steepens the slope until an earthquake triggers a massive landslide.

Paper: ENVIRONMENTAL GEOLOGIC ANALYSIS OF THE MONTEBELLO RIDGE MOUNTAIN STUDY AREA:
https://openlibrary.org/works/OL68916...
Pg. 22 mentions a landslide associated with the 1906 earthquake and this is ground zero for that slide. In fact, the report mentions that slide extended for 1/2 mile, nearly a kilometer, along the canyon.

USGS National Map Viewer w/ Hill Shade layers:
https://apps.nationalmap.gov/viewer/

More to come...
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#USGS #HillShade #geology #earthquake #tectonicplates