1883.] 189 [Dale. 



argillaceous and siliceous schist with minute crystals of magnetite. 

 This may be traced northwards to opposite 54, but the conglom- 

 erate reappears here and there for about half a mile as does that 

 of ridges I and II. 1 



Ridge VII likewise consists of conglomerate and argillaceous 

 schists ; the former at 43, 50, 42, 49 and 44, the latter about 50' thick 

 at 51, SE. of 44 (plate 1). The dip is evident at 42, 60°-70° E.SE. ; 

 at pt. 44, E.SE. steeply ; at 49 large masses of conglomerate 

 without schist appear to dip E.SE. As ridges I and II form a 

 synclinal so ridges YI and VII formed a ruptured anticlinal the 

 ruins of which are alone now visible. The conglomerate of VII 

 is highly metamorphic, the pebbles having unmistakably been 

 elongated and also coated with scales of mica. Fissures run 

 W.W. 



These data warrant the sections B', B", B"' for Paradise. The 

 numbers of the ridges are added and the beds numbered in one 

 series to show duplications. 2 



Wood's Castle, Taggart's Fekry, Black Point, Sandy 



Point. 



These are on the east shore of the Island. Prof. Ch. Hitchcock 

 refers to these localities : " Certainly there is a fold (in the con- 

 glomerate) to the east of Paradise, which may be traced along 

 the east coast of Middletown, between Sachuest Beach and Tag- 

 gart's Ferry." 3 He also gives the dip of the conglomerate north 

 of Sachuest Point on the east shore, 4 45°-50° E. and also W, 

 further north in the water, E. ; Taggart's Ferry slates, 45°-50° W. ; 

 south of Taggart's Ferry, 75° W. ; town line of Middletown and 

 Portsmouth, 30° E. ; and in his map conglomerates and grits 

 cover the whole tract between Purgatory, Sandy Pt. and Smith's 

 Beach with the exception of a strip of coal measures west of 



1 Wm. S Haines, C. E. of Providence, finds a local magnetic attraction in the 

 vicinity of Ridge VI deflecting the needle 32'. The average deflection on three lines 

 between the beach and all the ridges was 3' 10". This may be attributed' to the mag- 

 netite in the conglomerate and schist or to the hornblende. 



2 In drawing these and the other sections the actual strike, ascertained by a com- 

 parison of field notes with the location of the rocks on the U. ^S. Coast Survey Maps, 

 has been followed. This gives for the Paradise tract N, 21 E. true. 



3 Geology of the Island of Aquidneck, p. 116. 



4 Ibid. p. 135. 



