26 BULLETIN OF THE 
(9.) Channel of same brook near bridge west of Mr. Salmon’s.......... 13 feet, 
(10.) B. & A. R. R. cut near Mr. Oscar Smith’s........ 9 (at least) 26 “ 
(11.) B. & A. R. R. cut 2 m. N. E. of Richmond station.....(at least) 20 “ 
(12.) Channel of brook in ravine 3 m. N. N. W. of Mr. Cook's in the 
ook N Blas as مور ای‎ Foto hib arr etr S Oe dg درز‎ Tig 
(13.) Channel of brook at road crossing one slo N. E. of Mr. Cook's 
(aU OAR A IAN ene (E 
(14.) Channel of brook $ au. west of summit of Prospect Hill............ 4 “ 
5. DESCRIPTION OF THE BOULDER PHENOMENA. 
QUARTZITE BOULDERS. 
On the western slope of the Canaan and Lebanon Range are mariy 
boulders of gray and green quartzite, those of the latter color predomi- 
nating. These boulders are without definite arrangement, have suf- 
fered little abrasion, and-do not exceed two feet in diameter. The 
probable origin of the green quartzite boulders is Snake Hill, an emi- 
nence situated about seven miles northwest of Fry’s Hill, in the south- 
east corner of the town of Nassau, N. Y. (See map of the Wyomanock 
Valley.) Betwéen Fry’s Hill and Snake Hill the bed-rock consists of 
inica schist, a fine-grained, flaggy sandstone of a gray color, and a red 
shaly sandstone ; Snake Hill itself, consists of green quartzite, showing 
no signs of stratification. 
The eastern declivity of Snake Hill is very precipitous, and at its base 
the ground is almost entirely covered with large angular blocks of 
quartzite like that of which the hill is composed. Going east and south- 
east from this locality, many of these angular blocks are seen scattered 
irregularly over the surface, and having a length of from one to five feet. 
Une fourth of a mile south of Wheeler’s Hotel, East Nassau, the main 
road passes between two angular masses of rock, which have each ۵ 
length and height of 15 feet, being situated one fourth of a mile south- 
east of Snake Hill. Half a mile to the east and southeast an alluvial 
plain begins, and stretches east southeasterly up the valley of the Wyo- 
manock Creek as far as New Lebanon. 
From the vicinity of the large blocks just mentioned, down to the 
edge of the plain, the quartzite boulders are scattered quite thickly. 
The plain itself, however, is entirely destitute of them, but in the bed 
of the creek they occur in a number of spots in great abundance ; they 
are to be found also on the hills along the northern border of the plain, 
on the hills at its eastern end, and on the Canaan and Lebanon Range 
