SIXTH REPORT OF THE DIRECTOR I909 21 



The chief interest from the point of view of the glacial geology 

 is in the direction of the striae, records of this nature being- 

 found in about 24 localities. It is known that the movement a 

 few miles to the south, about Gloversville and Johnstown, was 

 westward, while the latest movement on the east, or about 

 Northville, was southward. The average movement in the dis- 

 trict now studied proved to be southwest, showing that the 

 higher grounds, well into the southern Adirondacks, felt the 

 influence of the great westward movement up the Mohawk 

 valley. The direct southward flow at Northville seems to have 

 been late and in the control of the local trend of the Sacandaga 

 valley. The top of the Pinnacle, on account of weathering, does 

 not show distinct gravings, but the molding shows clearly a 

 southwest trend. One mile north of Rockwood, on the edge of 

 the Lassellsville quadrangle, the striae even show a direction of 

 w. 20°-25° n. So at Wheelerville, near Canada lake, and by 

 Middle Stink lake, also on the Lassellsville area, readings are 

 approximately west. Aqueo-glacial drift was very nearly absent, 

 the chief exception being in some interesting glacial terraces 

 about Bleecker Center. 



The further extension of these Mohawk glacial waters was 

 studied in a broad way by Professor Fairchild from Taberg in the 

 Ontario basin to Coxsackie in the Hudson valley. The work was 

 partly in review of critical localities and partly new mapping of 

 the glacio-lacustrine features. 



It was found that a series of glacial stream channels lie along 

 the west side of the Hudson valley, in continuation of the stream 

 flow across the northeast face of the Helderberg scarp. 



Special problems 



Clinton formation. The value of this term in the geological 

 nomenclature of America has been a matter of some general 

 interest and discussion and as the term is an historic one, based 

 on a rock section at and near the village of Clinton, the signifi- 

 cance of the name and its proper definition may be briefly referred 

 to. It would be a matter of slender and local importance if this 

 rock series and the fauna it contains were confined to the State 

 of New York, but as the division was early established by the 

 New York geologists and the formation extends very widely 

 beyond the boundaries of the State, northeast, southwest along 

 the Appalachians, and broadly through the west and northwest, 

 its definition assumes an importance of some magnitude. 



