262 = od. zD. Dana—Geology of Vermont and Berkshire. 
greater compactness or hardness due to the heat and pressure, 
it has had its height less reduced by denudation. 
Berkshire, as I have already shown,* owes its highest sum- 
mits, similarly, to the occurrence of broad synclinals. Gray- 
lock, the highest, is one of them; and the Berkshire Mount 
er. 
This feature is so remarkable and so instructive in Mount 
Washington, that I here reproduce the outline map of the 
mountain, used in a former article,* on which the position, 
x 
& 
o 
~ \ Se 
fa \) 
*/f \) Be 
H — 
ee 
WASHINGTON j B= 
Hf — 
4 | 
2S 
i i —— 
f 1 
t 
“2 
a 
boundary between Massachusetts and New York, the width of 
which seldom exceeds a mile; while the rest of the unlined part 
of the map represents the area of Mount Washington, over 
miles in breadth. The Taconie range, as above stated, corre- 
sponds in its narrower part to a close synclinal, with the axial 
plane dipping eastward. But in Mount Washington the lime- 
* This Journal, IT, vi, 266. The outline of the mountain is taken from the large 
wall-map of Berkshire, bearing the date 1858. 
