ABSTRACTS OV PAPERS 93 



Prof. C P. Berkey suggested that much of the larger curving gneissie struc- 

 ture observed by Messrs. Hawkius and Brown might have been due to original 

 flow structure. 



Mr. Hawkins cited the observations of Loughlin (Bulletin 492. U. S. (ier)- 

 logical Survey), wlio found crushing in tlie grains of the Sterling, and said 

 that he and Professor Brown had observed shearing in included fragments in 

 tlie granite, such shearing being apparently post-inclusion. 



ACADIAN TRIASSW 

 BY SIDNEY POWERS ' 



{Abstract) 



The Acadian Triassic is exposed on both sides of the Bay of Fundy. In 

 New Brunswiclv the Triassic occurs on the west side of the Island of Grand 

 Manan, and also at Split Rock (near Gardner's Creek), Quaco. Martin Head, 

 and Waterside. In Nova Scotia the Triassic borders Minas Basin and tlie 

 Bay of r^nidy. 



The Newai'k group is divided into the following formations, whose thick- 

 nesses are estimated: 



Feet 



Scots P.ay formation 2,5- (2,(H)0? ) 



North Mountain basalt 80O- 1,000 



Annapolis formation : 



Blomidon shale 500- 1,000 



Wolfville sandstone 2,000- 2,500 



3,325 6,500 



luterbedded with the Annapolis formation, approximately at the horizon ot 

 the Blomidon shale, are the Five Island volcanics, consisting of tuffs, agglom- 

 erates, and basalt flows. 



'I'1h> Scots Bay formation consists of calcareous gray to green siindstoiie aixl 

 shale, carrying fish remains. It rests directly on the North Mountain basalts 

 and is conformable with them. The formation is preserved in small synclines 

 at Scots Bay. The North Mountain basalt consists of flows of varying thick- 

 ness. At Cape D'Or, in a 556-foot flow, evidence of gravitative differentiation 

 of the feldspar and augite and of variation of both grain and spccitii- gia\iiy 

 with depth have been found. The Annapolis formati<tn is composed nf red- 

 beds, and in the sandstones at Martin Head plant remains have been found. 



The structure of the Acadian Triassic comprises monodinal tilting toward 

 the northwest and gentle folding. Faulting is abundant, but most of the faults 

 have a small displacement. The major faults are at the ba.se of liie Cobe(iuid 

 Mountains, on the north side of the Triassic around Minas Basin, and on the 

 northwest side of the New T'.runswick areas. The honk in Xoitli Monnlain, 

 fioin C.-ipc P.loiiiiijoii to (';ipc Si)lit, is ii pitching svncliiic. cut olV on Mm- riorlh 

 l>y a fault. Another ini|ir>rtiitit syiicliiic is foiiiHl at <,»ii;ico. New i;nin<u ii-i^. 



Presented in lull ('\lcin|Miraneously. 



'Introduced by U. A. I'al.v. 



