THE 
HOC OFSGeEOLOGY 
NOVEMBER-DECEMBER, 18598 
BOWLDER-PAVEMENT AT WILSON, N. Y. 
BowLpers in till when groupt in an approximately horizon- 
tal plane and striated on their upper surfaces in a common direc- 
tion constitute a bowlder-pavement.’ Considerable attention has 
been given to such pavements in Scotland, especially by the 
Hugh Millers, father and son. In 1859, O. N. Stoddard 
described a fine example near Miami University, O., but no other 
American observations have come to my attention.? While 
engaged, last summer, in field work of the United States Geo- 
logical Survey, I came upon another example, which seems 
worthy of record. 
The village of Wilson is situated about twelve miles east of 
the Niagara River and half a mile from the shore of Lake 
Ontario. One of its main streets runs to the shore, where a 
short pier juts into the lake. There are longer piers a little 
farther west at the mouth of Twelvemile Creek. On this part of 
the lake coast the movement of shore drift is from west to east, 
and this movement is locally obstructed by the piers. West of 
the piers there is an accumulation of shore drift, and the land 
gradually encreaches on the lake. East of them the defect of 
shore drift deprives the shore of its natural protection, and ero- 
sion is exceptionally rapid. At the Wilson pier the bluff due 
« This is the usage of the Scottish geologists. The term has been employed in 
another sense by J. W. Spencer; see explanation of plate, p. 775. 
2 Diluvial Strize on Fragments in Situ, by O. N. STODDARD. Amer. Jour. of Sci., 
2d Ser., Vol. XXVIII, pp. 227-228. 
Unpublisht observations by H. L. FAIRCHILD and M. R. CAMPBELL indicate 
allied phenomena at Rochester, N. Y., and Cleveland, O. 
Vol. VI., No. 8. 771 
