292 GEOLOGY OF A PORTION OF SHELBURNE CO., 



Glacial deposits, other than the ground moraine, are large- 

 ly of stratified drift. Eskers are the most striking phenomen- 

 on, but kames are also present. The character of the deposits 

 must depend upon the kind of material with which the ice 

 has to work. In the peninsula of Nova Scotia are soft Triassic 

 sandstones and hard traps, developed only in a narrow band; 

 fossiliferous Lower Devonian shales; and pre-Cambrian quart- 

 zites, slates and schists; the latter two series being invaded 

 by the micaceous granitic rocks which form the central axis. 

 The Triassic and Lower Devonian sediments would not fur- 

 nish material for distant transportion and the traps would 

 suffer little from glacial erosion. Therefore, for Shelburne 

 County there was available a large quanity of sand derived 

 from the granite and quartzite, and some sand and clay from 

 the schist and slate, as well as massive material of each of 

 these rocks. Hence, the ground moraine in this region is 

 composed almost entirely of sand and boulders, drumlins 

 being absent. Large deposits of sand are found at Village- 

 dale, south-east of Barrington, forming numerous sand dunes 

 30 feet in height The grains of sand consist largely of quartz 

 with some pink feldspar muscovite, and biotite,- showing that 

 they were derived from the granite nearby. Sandplains do 

 not occur. 



Eskers were observed at Shelburne, Roseway, Cape Negro 

 and Port Clyde. The esker in Shelburne extends from near 

 the Shelburne House in a N 10° E direction for about 1,000 

 feet. Its height varies from five to fifteen feet. Boulders and 

 gravel appear on top of the ridge, the boulders having a length 

 of two to three and a half feet. Near Roseway there are 

 several eskers running nearly due south, the most prominent 

 one being near the shore. This esker is about one-quarter 

 of a mile long, 25 feet high and 75 to 100 feet wide. It forks 

 at the south into two ridges. On the top of the esker are 

 boulders 4 feet long,. 3 feet wide and 3 feet thick. North of 

 Port Clyde are abundant eskers, some of which have an east- 



