32 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



the conglomerate ; they contain a few fossil plants. This section 

 on Right's River includes a thickness of probably 8000 feet. 



Section V. 

 Ogden's Lake to South Lake, near Antigonish (4 miles). 



d. Grey sandstone, and red conglomerate. 



c. Soft red sandstones and clays ; lignite, catamites, &c. 



a. Altered dark sandstones and shales; intruded greenstone. 



b. Grey and soft red sandstones and shales. 



e. Limestone. 

 /. Gypsum. 



Another section, near the mouth of Antigonish harbour, displays 

 a series somewhat similar. At the north side of the outlet of 

 Ogden's Lake, about eight miles from Antigonish, is a bed of gyp- 

 sum, probably nearly 200 feet in thickness. Its upper part is 

 composed of white granular gypsum, in thick laminae, and with 

 disseminated particles of carbonate of lime. Beneath this is a con- 

 siderable thickness of foliated red gypsum, in its lower part alter- 

 nating with layers of a grey argillaceous non -crystalline limestone, 

 on which it rests, and which is penetrated by small veins of white 

 fibrous gypsum in its upper portion, while below it becomes brec- 

 ciated, and then laminated. It is probably 100 feet thick, and ap- 

 pears to contain no fossils. These great beds of gypsum and lime- 

 stone dip to the S. S. E. at an angle of 25°, and rest unconformably 

 on soft red sandstones and shales, with some grey sandstones and 

 reddish conglomerate, dipping nearly in the same direction, but at 

 an angle of 50°. Following this underlying series in the descend- 

 ing direction, it becomes more highly inclined, and is finally ver- 

 tical, resting against a mass of altered and contorted dark shales 

 and sandstones, with veins of greenstone containing much epidote. 

 This part of the section is connected with a ridge of igneous 

 rocks running in an east and west direction, and which a few miles 

 farther inland attains a considerable elevation. It consists of a 

 reddish syenite, quartz, compact felspar, and greenstone. After 

 passing these disturbed rocks, there is a break in the section, which 

 is next occupied by thick beds of brownish-red sandstone and clay, 

 supporting a thin bed of conglomerate and some thick beds of grey 

 sandstone, containing Catamites, Sternbergia, Endogenites, Carpo- 

 lites, and pieces of lignite. The relations of these beds to the other 

 parts of the section I could not determine. They dip to the north- 

 east, and probably belong, either to the upper part of the gypsi- 

 ferous formation, or to some newer member of the coal series. 



These sections differ from that of the East River of Pictou, chiefly 

 in the presence of large masses of sandstone and conglomerate be- 

 neath the limestones, and in the non-appearance of the thick series 

 of sandstones above the gypsum, so conspicuous in the Pictou 

 sections. 



