60 Ga tel JANIE CAC OOK 
SURFACE GEOLOGY. 
Few of the early state reports have discussed glacial phe- 
nomena so fully as that of New Hampshire. The glacial theory 
of Agassiz, and Dana’s doctrines as to the origin of the modified 
drift in connection with the flooding of river valleys through 
the melting of ice were accepted to explain the facts obtained. 
Measurements of strie were taken everywhere, whether upon 
the tops of mountains, scant forest exposures, or in valleys, 
their number much exceeding those taken by any other organ- 
ization.t The most important conclusion derived, for which the 
territory is best adapted because of the great elevation of the 
land, is that during the maximum ice development the motion 
came from the northwest and was directed over the mountains 
~ southeasterly; or, in other words, from the St. Lawrence Val- 
ley up the northward slopes of the White and Green Moun- 
tains, and over them towards the Atlantic.2 Striz were noted 
upon the summits of nearly all the highest mountains, and 
where these were wanting transported erratics abounded. Later 
observations have shown some form of glacial work upon every 
summit and every col of the White Mountains. By way of 
confirmation of this doctrine, our latest unpublished observa- 
tions show that remnants of the accompanying terminal moraines3 
had a northeast-southwest course, being at right angles to the 
normal direction of the ice-sheet. In other parts of the state, 
notably upon the seaward slope, the striae appear to have been 
deflected by the topography; and still later evidence is pre- 
sented to suggest the presence of local glaciers radiating in every 
direction from the higher mountains, pushing northerly and 
northeasterly into Canada as well as to the south. A few sug- 
gestions as to the diversity of the Ice Age were made, such as 
would now confirm the theory of Geikie. They consist in the 
advocacy of interglacial deposits in the valley of Lake Winni- 
piseogee and about Portland, Me., and in the existence of an 
tSeventh Annual Report of the U. S. Survey, p. 157. 
2 Bulletin Geol. Soc. Am., Vol. V., p. 35. 
3 Procy Amen.pAwyA. TS CleflVOloXclleanpaeki7/3% 
