202 SURFACE GEOLOGY. 
along the river, the usual course is west of south. Observations west of 
Ascutney are wanting. It appears, therefore, that the observations are 
not ample enough to say positively, though it is probable, that the stria- 
tion of Ascutney is like that of Monadnock. 
Mt. Pleasant, in Denmark, Me., may also be mentioned as allied to 
Monadnock. South of the mountain the course is S. 12° E.; east, it is 
S. 20° E.; north, it is S. 8° E,, while one observation in Fryeburg, to the 
west, reaches S. 32° E. On the summit the strie run S. 41° E. On the 
north-west side, following down the path, good examples occur of the 
course S. 31°-33° E. Lower down are others less satisfactory, running 
S. 52° E. Not far from the Half-way house are some seemingly local, 
running west down the hill. 
Certain other elevations in the state, with topographical surroundings 
like Monadnock, show little difference in the direction on the summit 
and the neighboring plain. Such are the Moose mountains in Brookfield 
and Middleton, Teneriffe in Milton, New Durham ridge, Catamount hill 
in Pittsfield, Blue hills in Strafford, Saddleback in Northwood, Temple 
mountain, Barrett mountain in New Ipswich, etc. Crotched mountain in 
Francestown, Ossipee in Carroll county, and Pawtuckaway in Notting- 
ham, have not been studied, while Green mountain, Effingham, is too 
thoroughly disintegrated to preserve any markings. 
PREDOMINANT CouRSES OF STRLA. 
The Vermont geological report states that the striae may be classed in 
three divisions,—those pointing to the south-west, south, and south-east, 
the first being the least common. The south-west course is much more 
infrequent in New Hampshire, while the south-east direction is more 
prevalent than in Vermont. A sketch map in Volume I (p. 542) shows 
the general relations of these three kinds of movement for both states. 
Many of the striz are so disposed that they may be believed to be the 
result of valley movements. In our researches we have constantly asked, 
How much do topographical features influence the course of the striae? 
The replies forced upon us insist that a portion of the directions is due 
to topographical features, while others—the majority—pursue a fixed 
course, in total disregard for all obstacles. The first we have styled val- 
ley movements. A part of these are distinguishable from the others 
