(7) 
The thickness of these rocks along the Clifts is about 400—600 
feet and the Paradise series measures about 950—so that we can 
adopt 400' and 900' for the extremes. Both at the Dumplings 
and Bailey’s Beach, these greenish magnesian rocks lie upon a 
pinkish rock which might easily be mistaken for a granite, but 
which is more correctly a protogine, the mica of the granite being 
replaced by the dark greenish magnesian mineral, chlorite. The 
protogine is characterized in places by crystals of feldspar an 
inch in diameter, and in others, by the presence of two shades if 
not two kinds of feldspar, a pale greenish and a pinkish color. 
Although it has been supposed to be eruptive, it is clearly strati¬ 
fied, and therefore a sedimentary rock, highly metamorphosed. 
This protogine forms the point about the Boat House, Goose¬ 
berry Island, and the region about the Lily pond, extending from 
the west side of Lily pond beach to a point opposite the Little Lime 
Rock. It forms also the southern part of the northern extension 
of Conanicut. About Narragansett Pier, from the steamboat 
landing south to within two and one-half miles of Point Judith, 
protogine passing into a gneiss with black mica occurs, and the 
same rock constitutes also East and West island, on the other 
side of the bay. The thickness of these beds of protogine is not 
easily computed. It is at least 1200' and probably much greater. 
West of the protogine tract of Newport Neck and forming the 
central part of it is a “ flinty slate” in places containing serpen¬ 
tine and talc. This rock lies upon the protogine, as may be seen 
at several points, and as is conclusively proven by the presence of 
two small patches of the flinty slate near the middle of the proto¬ 
gine tract, on the west side of Lily pond. 
The western boundary of the flinty slate extends from Brenton’s 
Cove to the west side of Price’s Neck. The same recurs at Co¬ 
nanicut forming a triangular shaped mass north of the protogine, 
and also on Sachuest Neck where associated with a slaty con¬ 
glomerate it forms a belt on the east side. The thickness of this 
scries varies from 500'—2000'. The remainder of Newport Neck 
consists of a series of alternating green and purple slates with 
passages of calcite and occasionally red jasper. The rock (chlo¬ 
ride argillyte) forms also the greater part of Rose Island, the 
Gull Rocks, the southern extremity of Coaster’s Harbor Island, 
