404 la OG AVM 
WASHINGTON COUNTY.—Continued. 
Direction | 2 
ele rreae Township. Locality. ieee Formation, Remarks. 
north). aE: 
N. 42 E. Dresden Dresdens Centres 500 Gneiss Vo 185 IK 
ING 77 Jeb e 1% mile south of last.......} 500 os rs 
ING Be & 1 mile slightly south of east 
of last (near Lake Cham- 
Pllatinn) osxetagerceaterennorss rere _ 100 iY a 
ING 2aE3 s ¥% mile south of last....... 100 
INE 7k s East of Long Pond........ 1,000 | Potsdam : 
INGA Gs vo rte Asma Tpit ies fe veeiten cite nce mea tenancy een EMM euatee a e tallMe seca rare carektone of 
N. 40 E. ST ae ec RR CREA Uae at asl Ween UML Es Ra ante of 
INS 28h PPL AN GN al eerste seca caret aap tay tise dated rere AU eee tre neue een aM ‘ 
INS Suk OE Pe rest RDU eI MSE Ps UGH ar ear eel ast antiga cea hilRs OM se Meee EA ar Dac ‘ 
N. 50 E. Ree eco | UarGart eter erie eee hee More ven Ung eet We a ae : 
N. 60 E. | ea | PRR a aeons mec hetero eNO Ae! ot aly allie eaPheOe veal | pct ck ey see HEN le “ 
Ness: | psu ghee sererenc  cnmiet re Uefa el er cesta ran elrapa tet | acti pace: Seer tts i 
The widest valleys, and hence the most favorable for ice 
movement, were the Champlain and St. Lawrence valleys bound- 
ing the region. Therefore, as the ice advanced down the lower 
St. Lawrence, it must have split into two streams on either side 
of the Adirondacks; at the time of its maximum extent these two 
streams flowed around the obstruction, their edges meeting in 
the Mohawk valley near Utica; as it retreated the valley por- 
tions melted first, forming lakes in the depressions, while local 
glaciers were left on the highest mountains. 
These results are entirely in accordance with the phenomena 
to be found in the Mohawk valley.*. Later work completely 
bears out the early suggestion of Chamberlin, in the report 
already cited.? After discussing the moraines of the Mohawk 
valley he says: 
[hesitate at this stage of the inquiry to encourage any confident opinion 
in regard to the exact history of glacial movements in the Mohawk valley, 
further than the general presumption that massive currents having their 
ulterior channels in the Champlain valley on the one hand, and in the St. 
Lawrence on the other, swept around the Adirondacks and entered the 
‘ALBERT PERRY BRIGHAM, “Topography and Glacial Deposits of Mohawk 
Valley,” Bull. Geol. Soc. of America, Vol. IX, pp. 183-210. 
2T, C. CHAMBERLIN, Third Annual Report, U. S. Geol. Surv., pp. 295-402. 
