294 GEOLOGY OF A PORTION OF SHELBURNE CO., 



noted are: in the vicinity of Sand Point and Fort Point (op- 

 posite Sand Point) N-S to N 5 W; a mile east of Greenwood 

 N 5 W; at Black Point N 15 W; Negro Island N 8 W 

 with an apparently earlier set of striations in one place of 

 N 40 W; a mile north of Blanche N 10 W; near Port La 

 Tour N 27 W; near Baccaro N 12 W to N 27 W; near Bac- 

 caro Point N 25 W and one outcrop N 40 W; at Barrington 

 N 12 W. 



SEDIMENTARY ROCKS 



The southern and western portions of Nova Scotia are 

 largely underlain by a series of quartzites, slates and schists, 

 called the Meguma or Goldbearing Series. The age of these 

 rocks is pre-Cambrian. The series has been divided litholo- 

 gically into two conformable formations, the quartzite divis- 

 ion at the base being called the Goldenville formation, and 

 the slate above, the Halifax formation. The thickness of the 

 former has been found by Faribault to exceed 23,700 feet, 

 and the thickness of the latter is 11,700 feet, giving a total 

 thickness to the series of nearly 7 miles with no base exposed. 



In Shelburne County these two formations are represented 

 by quartzites, some of which show the effects of contact 

 metamorphism, and by schists, all of which are filled with 

 metamorphic minerals. The exposures are so few and the 

 faults so numerous that it is impossible to measure the thick- 

 ness of the series. Their general distribution may be seen 

 on the accompanying map. 



The first exposure of the metamorphic rocks south of Shel- 

 burne is found on the shore halfway to Sand Point. Very 

 fine-grained grey mica schist cut by aplite veins occurs here 

 within a short distance of the granite. Approaching Sand 

 Point, staurolites and large mica crystals begin to appear in 

 the rock. At the point are large ledges and roches mouton- 

 nees of a lustrous schist containing numerous staurolite prisms 

 a quarter of an inch in length, very abundant smaller biotite 

 crystals all orientated parallel to the schistosity, and very 



