288 T. N. Dale—Geology of Rhode Island. 
their chronological order, as far as determined, beginning with 
the oldest: 
‘Ol. Granite, Gneiss, Protogine—Coarse and fine granite and 
gneiss, of black mica, more or less pinkish feldspar, and quartz, 
passing in some places into a protogine of chlorite, pink, or a 
pinkish and a greenish feldspar, and quartz, in others into a 
granite of light-colored mica, cream-colored feldspar and quartz. 
The bed of plumbago probably belongs in the gneiss. Veins - 
of coarse, pink granite, sometimes without mica, and of erypto- 
erystalline, pink feldspar and quartz. One vein or seam 0 
yellow serpentine. (West Island, Narraganset Pier, Newport, 
and Conanicut.) 1300’+. 
‘02. Mica schist, dark and light colored, both with black mica, 
the light more quartzose and with quartz pebbles. Veins of 
oo granite of cream-colored feldspar, light mica and quartz. 
5 
and also sometimes with crystals of feldspar, . also veins of 
zoisite. (‘' Paradise” in Middletown.) 950’. 
5. Epidotie and chloritic schist.—In places argillaceous, — 3 
serpentine or talcose, with nodules and veinlets of crystalline 
epidote, massive and schistose chlorite, the chlorite schist with 
a little calcite; sometimes with pebbles of quartz. A few 
layers of ferruginous chlorite, and of quartzyte with quartz eb- 
bles, in the lower part. Veins of eryptocrystalline pink eld- — : 
spar and quartz, and of milky quartz. 400’-600’". 
A similar series seems to occur near Providence {see Jackson, pp. 75, poe 
D . : 
* 
and near New Haven (see J. D. Dana, Manual of Geology, third edition, the 
fourn:l, III. vol. vi. On the Rocks of the Helderberg era in the valley of 
Connecticut, ete. ate 
