1883.] 197 [Dale. 



chloritic schists, but I think they belong below the latter. Their 

 presence on the east of Sachuest Neck is not probable, for if 

 hornblende schists occurred between beds 1 and 3 their toughness 

 would have insured some traces of them on the shore of Little 

 Compton. These layers (1) consist of five beds of hornblende 

 schist alternating with as many beds of mica schist. Jackson 

 describes a similar series : 1 " Returning to Providence, by the 

 route through Cranston, we passed over hornblende rock 

 obscurely stratified, and dipping to the "N.W. Then we came to 

 mica slate alternating with hornblende rock on Neutaconkanut 

 Hill, and passed over the conglomerate of the Grau-Wacke series, 

 until we reached Providence." The anticlinal at Easton's Pt., 

 and the identity of the conglomerate on both sides of it have 

 already been shown. The discrepancy between Prof. Charles 

 Hitchcock's construction of this locality and the writer's is due 

 to the former having mistaken joints for layers, and as their direc- 

 tions are nearly opposite the two results are equally different. 



The chronological order and the approximate thickness of the 

 beds described are as follows, beginning with the oldest. 



1. Hornblende schist alternating with mica schist. 2 950' 



2. Chloritic schists and associated argillaceous 



and micaceous schists. 500'-750' 



3. Greenish, slaty conglomerate with argillaceous 



and siliceous serpentine. (Congl. I.) 500' 



4. Quartz and clay aggregate. 750' 



5. Argillaceous schists and associated slates, etc. 600' 



6. Quartzite conglomerate with grits and some 



arg. schist. (Congl. II.) 750' 



7. Carbonaceous schists and shales with argilla- 



ceous schists. 500 



8. Fine argillaceous conglomerate and grit. 500' 



Total, 4950'-5450' 

 Flexures : There are four anticlinals and as many synclinals in 

 this portion of the Island but the folds disappear to the north, 

 and north of the Portsmouth boundary a different system pre- 

 vails. The same causes which powerfully folded the strata pro- 

 duced also the fault at Paradise. 



l p. 75, 76. 2 Possibly later than No. 2. 



