Screen-capture image from Google Earth, showing an oblique, northward view of the west side of the Beaver Dam Mountains. The gravity-slide blocks are visible for us to see and ponder because they are exposed in a structural high known as a relay ramp, which links the Red Hollow and Piedmont faults. Sheared and tectonically thinned strata of the upper plate of the Castle Cliff fault hug the mountain front and are also present at Sheep Horn Knoll just above Welcome Spring. These upper-plate strata, which once covered Precambrian metamorphic and igneous rocks (Xu) that now form the exposed core of the range, were the source of the gravity-slide blocks.