40 BULLETIN OF THE 



Mr. Wailsworth says of these specimens : "Nos. 1, 3, 4, 12, 13, and 17 are 

 chlorite schists, composed principally of chlorite in leaves, granules, and fibres, 

 the fibrous forms predominating. The chlorite is of a light or brownish-green 

 color. Kaolinized feldspar is also very abundant ; the other minerals being 

 opacite, brow-n mica, and pyrite ; the opacite arising partly from the alteration 

 of the pyrite. These schists are evidently much metamorphosed. 



" Xo. 21 is a chloritic mica-schist, very fine-grained, and made up chiefly of 

 a ground mass of chloritic matter holding numerous irregular flakes of brown 

 mica, and a very few grains of quartz. 



" No. 5 is a chloritic sandstone composetl of quartz grains and chlorite, with 

 some kaolinized feldspar and crystals of magnetite. The (quartz contains fluid 

 inclusions, and in some of the grains occur the long black microlites, so com- 

 mon in the quartz of granites. This, together with the form of the grains, 

 would indicate that the sandstone was derived from the disintegration of 

 granitic rocks." 



NOTE C. 



REMARKS ON THE STRATIGRAPHICAL GEOLOGY. 



The distribution and lithological characters of the difterent bed-rocks in the 

 region has already been given (page 22). The distribution is also indicated 

 on the map by geological colors, and the direction of the dip is indicated 

 by arrows, the small circles on the arrows marking the spots where the obser- 

 vations were taken. 



The limits of the band of chloritic rock, which is represented on the map as 

 extending along the crest of the Canaan and Lebanon Range, could not be 

 ascertained with certainty, but wherever exposures were observed along the 

 crest, a rock entirely different from that of the great mass of the range was 

 found. This rock has a decided green color, is very compact, and cannot be 

 .'iplit into thin plates, and this assemblage of characters distinguishes it at once 

 from all the other rocks of the region, except the narrow band of the same 

 rock on the other si<le of the Shaker Valley. Two typical exposures of the 

 rock in this band have been described, namely, the chloritic schist of Fry's 

 Hill, and the chloritic sandstone of Douglas Knob ; how much of the band is 

 ma<le up of each kind of rock, it is, from lack of a sufficient number of ex])08- 

 ures, impossible to determine. 



The limits of the two narrow bands of limestone on the western slope of the 

 Richmond Range are not known with certaintj', the location of one of the 

 bands being based on only two, and that of the other on only three exposures. 



The boundaries between the schists of the Richmond and of the Lenox 

 Range and the limestone of the Richmond Valley were fixed with tolerable 

 certainty, also that l^etween the schist of the Lenox Range and the limestone 

 of the Lenox Valley, althuugh along none of these boundaries was the direct 

 contact of the two rocks observable. 



