a giant alluvial fan spreads out at the bottom of Kaaterskill Clove
Far Left, fractures at top of hill. Left center – the landslide escarpment on Rt. 10
see slide escarpment in upper left. everything
else is sliding down and to the right to slowly
overwhelm the highway at bottom of hill Right Center – Bottom of the slide (the “toe”). This black earth consists of ice age lake deposits.
Right - Closeup of the fault
scarp at top of hill (the “head”)
The Vanderbilt Estate displays many of the features of an ice age delta. These are common throughout the Hudson Valley
Middle- Vanderbilt mansion sits atop the foreset delta slope.
Left - The foreset slope of the delta, north of the mansion.
Right- Vanderbilt mansion sitting upon the Hyde Park Delta topset.
This week’s column (Dec. 3rd) is about ripple marks.
There are two types – The first is the asymmetric current ripple, which is shown to the right. One side is shorter and steeper than the other.
Above, top, is a wave ripple which shows symmetrical ripples
