T. N. Dale—Geology of Rhode Island. 225 
laceous and schistose; also at 62, 70 and 66. At 62 and 70, 
this appears to be exceptional, for on Price’s Neck it is again 
more siliceous. At 66, it encloses fragments of chloritic argil- 
lyte. The adjoining rocks on the west are not dissimilar an 
‘dip 15°-20 N.E., as do the slates a little north, which belong - 
to the siliceous argillytes. It is difficult to determine the pre- 
cise boundary at this point. Perhaps it should be drawn at 
67 where greenish-gray slates dip 10°-15°-20° E.S.E., and hold 
nodules of a decomposed ferruginous quartz. 
The rest of the neck is mainly occupied by bluish green and 
dark purple, slaty, chloritic argillyte. At 71, it is decidedly 
chloritic, dipping 85° N. 12° W., containing passages of calcite, 
and underlaid by a ferruginous, siliceous chlorite schist,* resem- 
bling Somewhat that at 17, Bailey’s Beach, but, still more, cer- 
tain layers in Church’s Cove, Little Compton, at the base o 
the chloritic argillytes. Some disturbance has occurred here, 
for these ferruginous rocks protrude through the overlying 
argillytes and a thick quartz vein with chlorite traverses close 
by. At 72, these argillytes with calcite dip 15° N.E., at 73, 
10°-25° N.E., at 74, alternating with dark purple ones, 10 
-E. A little west the purple and green run in stripes across 
the bedding and the layers seem somewhat talcose. At. 75, 
‘faves Point, veins of quartz with chlorite; a little west, 
Black Point, the dip is 10°-15° N.E., at 76, 10°-15° E.S.E. 
t 77, green and purple, very finely laminated and lustrous 
"Slates dip 15°-20°-25° NN, W.; at 78, the purple ones, 5°-10 
NN, - abounding in calcite. A little north the dip ts 
15°--20°_95 N.N.W. At Ragged Point, grits and purple slates, 
15°-20° N.E., at 80, Ram’s Head, 15°-25° N.E. with quartz 
yelns containing chlorite and feldspar, and slickenside planes . 
25°-30° S.S.B. At 81 the slates dip 10°-20° E.S.E. On the 
west side of Castle Hill the argillytes abound in calcite. At 
82 purple and green slates dip 25°-30° E.S.E. A recent exca- 
vation south of 82, brought to light green argillyte containing 
“fge nodules of limestone traversed by small veins of erystal- 
line calcite. At 83, the dip is 35°-40° N.N.W., at 84, purple 
and green slates with calcite, dip 15°-20° E.S.E. From 84 to 
85, Stayish, greenish and -purplish schists, here and there with 
sileite, dip 15°-35°-50° E.S.E. At 85, on Point of Frees Beach, 
Pieated schists of alternating lamin of quartz and slate crop 
Rg qbPing 20°-25° E.S.E. “At 86, the chloritic argillytes dip 
‘S.E. and at 87, with calciteand pyrites, 10° ESE. From 87 
Southwest to 73, there areanumber of outcrops. At 88, ‘ten 
slates dip 30°-85° E.S.E.; at 89, purple and green, the former 
enclosing dark purple jasper, dip E.S.E., and continue ina ridge 
trending N.N.E. smal! bowlders A bbles of dark purp e 
5 
* See Ch. H. Hitchcock, op. cit. p 126. 
