14 W. B. Dwight on a Subsidence of Land. 
its whole extent, but most deeply at its western edge, whi 
rested at a depth of 40 feet below its former position at the ter- 
race level; it probably moved also a few feet to the eastward. 
other fragment also sunk considerably at its thicker end, 
thus bringing its surface nearer to a level; but it had also a de- 
cided sliding movement toward the creek, for the distance of 
from a foot or two at the southern, to 42 feet at the northern 
end. This measurement was obtained by ascertaining the varia- 
tion of a line of stakes, trees and other landmarks, from the 
original line which was known. 
he effect of this double movement upon the ground at the 
creek was extraordinary ; the whole bed of the stream, together 
with a portion of its borders, was lifted bodily, and left at the 
of a long and nearly continuous mound. is mound is 
from 75 to 150 feet wide at the base, and in most places 30 feet 
high, thus becoming the highest ground on the eastern section 
of the slide. 
the higher part of the slope, at once sunk, partially throughout 
ich 
the northern—there are numerous intersecting fissures, varying 
in depth; making 
ice 
eet, carrying 
and holding it ina 
