GLACIAL DRIFT. 195 
Courses of Strie—Continued, 
LOCALITIES. | ROCK. | Gane, REMARKS. 
Broomfield,—M. McLucas’s.....-..| Granite... S. 18° W. 
Hiram,—north west of Spectacle 
ond.. Gneiss ....--60-. S.12° E. 
Cornish, 
lage. Montalban. S. 22° E 
Standish,—west edge SE rsyapaarenls Ss. 
Limington,—W,. Chick 
of hill 5 
F. Strout’s, top of hi 
Limerick village ........ceeeeeeeeeee 
Alfred,—¥% mile north of N. Alfred, . 
J. Roberts’s.... seeeseeee isaienaihes 
South Berwick..........-..+.. sijavaneda ave 
Danville junction, G. T. R.........+ 
Saco slate quarry.......eceeeeen ones 
Cape Elizabeth,—T. Seavey’s....... 
Several examples of this acai di- 
rection occur for 14 mile. 
On wall—well shown. 
i] S. 8° W. course the most common. 
Bdge 208 « iereccsteraawsrsieceie esiwlareananns. 
Peak’s id. —Evergreen landing .... 
Bast Sides sic iisscresg steaeis ceases 
Cape Elizabeth,—Rail schist locality. 
Deering,—hospital......--.esseeeeee 
MAasSACHUSETTS. 
Northfield,—very near New Hamp...| Micaschist......] S. 8° W. 
New Salem,—top of hill .........++5 Gneiss .........-] 5S. 12° W. 
South Royalston.........ceeeeee eens OS caxaveratai evens S. 10? E. 
Salisbury,—Eastern Railroad cross- 
ing north of village...........+ Sienite ........ weil) Sp rO 
Bernardston,—top of West mountain.| Slate..........+ S. 5° a Ss. 
10' 
Newbury,—several places...........] Sienite....,..005 S. E. According to Massachusetts report. 
Remarks, The table contains everything needful for explanation, save where more 
than one set of striz is mentioned. When two or more sets occur in immediate con- 
tiguity, not crossing each other, the fact is indicated by the use of the conjunction azd; 
when two or more intersect each other, the letter x is employed, and the fact is usually 
stated in the column of remarks. 
The embossment of certain ledges in Pittsburg and Shelburne is peculiar, in that 
the lower part of the rock below the smoothed surface is rough. The ice may not have 
struck the lower part of the ledge; or, in some cases, the subsequent disintegration 
may have removed the lower part, leaving it as rough as the lee side. The Pittsburg 
examples may be eight or ten feet high, with a roughness of three feet, partly to be 
accounted for by the easy removal of rock on account of the presence of easterly dip- 
ping jointed planes. The Shelburne example is more striking. It is about a mile 
below the station. The ledge is about 30 feet high and 75 long, and the roughness 
below the striated part as much as 6 feet. The irregularities upon the lee side begin 
at the very top of the eminence. The end struck is 4o feet wide, tapering to a blunt 
point, where the smoothed appearance disappears; and the inclination of the stoss 
slope towards the north-west is about 50°. 
Wall and floor surfaces are alluded to. This is because some writers insist that the 
former method of sculpture is never seen with iceberg action, being produced only by 
a glacier. As noted above, this species of moulding is very common. 
