IN EASTERN CANADA. AMI. 177 



sandstones and conglomerates, carbonaceous shales and mud- 

 stones, besides diorites and other basic intrusive rocks. 



2. An unconformity. 



3. Windsor limestones and Hopewell sandstones, constitut- 

 ing distinct formations which overlie the Union and Riversdale 

 formations. 



4. (An unconformity, according to Mr. Fletcher.) I have 

 not yet been able to detect any unconformity at this juncture. 

 There is no unconformity between the Millstone grit and the 

 underlying shales, calcareous and other conglomerates and sand- 

 stones of Cumberland Basin. 



5. Millstone grit of Skinner McDonald's Brook. 



6. In certain portions of Pictou County, N. S., an uncon- 

 formity occurs, e. g., at Blackwood Brook, opposite New 

 Glasgow, where the upturned edges of the "Millstone Grit" 

 (Logan) are overlaid by the New Glasgow conglomerate of 

 Fraser's Mountain, &c., whereas in other portions the Millstone 

 grit is directly superimposed by the Coal Measures, e. g., at 

 Westville and the Joggins. 



This peculiar geological succession in these two areas give us 

 two series of sediments in the succession of formations which in 

 part only are synchronous, hold similar organic remains, but 

 exhibit great variety in sedimentation. 



A. Joggins and Westville Areas. B. New Glasgow Region. 



V. Millstone grit. V. Millstone grit. 

 VI. Coal Measures.* VI. Unconformity (of Blackwood Brook). 



VII. New Glasgow conglomerate. 

 VIII. Spirorbis limestone. 



IX. Smelt Brook shales and sandstones. 

 X. Pictou sandstones. 

 XI. Cape John formation, red sandstones 

 and conglomerate. 



* The Coal Measures of Pictou County at Stellarton and Westville consisting of 

 bituraous shales, clays and sandstones, are not anywhere seen to be overlaid by any of 

 the formations in series B. 



PROC. & TRANS. N. S. INST. Set., VOL. X. TRANS L. 



