GLACIAL DRIFT. 



Courses of Stri<2 — Contimied, 



195 



LOCALITIES. 



ROCK. 



TRUE 

 COURSE. 



Broomfield, — M, McLucas's 



Hiram, — north west of Spectacle 

 pond 



Cornish, — Ossipee river, above vil- 

 lage 



Standish,— west edge 



Limington, — W. Chick's, east base 



of hill 



F. Strout's, top of hill 



Limerick village 



Alfred,—!^ mile north of N. Alfred. . 

 J. Roberts's 



South Berwick 



Danville junction, G. T. R 



Saco slate quarry 



AndaUisite schist 



Cape Elizabeth, — T. Seavey's 



Edge of 



Peak's id., — Evergreen landing ., . . , 



East side 



Cape Elizabeth, — Rail schist locality, 

 Deering, — hospital 



Cambrian. 

 Huronian. 



Mass.\chusetts. 



Northfield, — very near New Hamp... 



New Salem, — top of hill 



South Royalston 



Salisbury, — Eastern Railroad cross- 

 ing north of village 



Bernardston, — top of West mountain, 



Newbury, — several places 



Mica schist. . 

 Gneiss 



Sienite , 

 Slate . . . 



S. 22° E. 

 S. 



S. 52° E. 

 S. 33° W. 



S.22° E. 



S. 32° E. 

 S.320 E. 

 S.32° E. 

 W. ofS. 



S. I5°-20° E 



S. 8° W. and 

 S. 22° E, 

 S.27°E. 

 S.220 E. 

 S. 37° E. 

 S. 12° E. 

 S.2°E. 



S. 8° W. 

 S. 12° W. 

 S.io= E. 



S.5i° E. 



S. 5° E. .X S. 



10° E. 



S. E. 



Several examples of this remarkable di- 

 rection occur for Vz mile. 



On wall — well shown. 



S. 8° W. course the most common. 



According to Massachusetts report. 



Retnarks. The table contains everything needful for explanation, save where more 

 than one set of strire 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 and; 

 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 40 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. 



