AMERICA. 115 



rock is removed, and the name Potsdam dropped. 3. Canadian period^ 

 including the Calciferous sand-rock and the Chazy limestone. 4. 

 Trenton period, Trenton limestone and Cincinnati group — Hudson- 

 lliver group being dropped. 5. Upper Siluria^i, Onskani/ period, the 

 latter being transferred to the Silurian from the Devonian. 6. Devonian 

 age, CatsHIl pei-iod, additional information being required before 

 the Catskill group can be allowed to be equivalent to the Chemung. 

 7. Quaternary, in which is merged the age of man. G. A, L. 



Dawsox, G. M. Eeport on the Tertiary Lignite formation in the 

 vicinity of the 49th parallel. British ■ N orth American Boundary 

 Commission, Geological Report of Progress for the year 1873. 

 8vo. Montreal : pp. 31, two plates. 

 . This is a general description of the Tertiary Lignite formation which 

 overlaps the Cretaceous formations west of Red River. This is un- 

 doubtedly an extension of the Great Lignite or Fort- Union group of 

 Hayden. It is the lowest known American representative of the Ter- 

 tiary series. The flora has a Miocene aspect ; and the fauna is chiefly 

 freshwater. Many sections are given (on West Souris River, on Mis- 

 souri Coteau west of 363-mile Point, in Porcupine Creek and tributary 

 valleys), and many analyses of lignites and ironstones. G. A. L. 



Dawsox, Principal J. W. On the Upper Coal-formation of Eastern 

 Nova Scotia and Prince-Edward Island in its relation to the 

 Permian. Quart. Journ. Geol. Soc. vol. xxx. pp. 209-219. 



Tills formation is an upper series, lying above the productive Coal 

 Measures, and is distinguished by the absence of thick coal-seams, and 

 by the occurrence of red and grey sandstones and red shales with plants 

 of Permian affinity. No break is observable between these beds and 

 the Trias above. The author proposes for them the name Permo-Car- 

 honiferous (already given to some limestones in the West), on account of 

 the strong resemblance which they bear to the Permian of Europe, to 

 which they are more nearly allied than to the Permian of the interior 

 of North America. A list of fossils is given, and two transverse sec- 

 tions. G. A. L. 



. On the geological relations of the Iron Oree of Nova Scotia. 



Proc. Amer. Assoc, vol. xxii. B. pp. 138-146, 1 fig. in text. 



These ores are considered under the followiug heads : — 



Bedded Ores. — 1. Great Hematite bed of the lower Hclderberg series 

 (E. branch jof East River, Pictou, and upper part of Sutherland's River), 

 30 feet thick, with 10 to 20 feet of good ore. 2. Hematite and mag- 

 netic iron of Nictaux and Moose River. In Oriskany Sandstone. 

 3. Bedded ores of the Carboniferous system. In Pictou. True spathic 

 iron and clay ironstones. Veins of Iron Ore. — 1 . Great specular-iron 

 veins of the Silurian slates and quartzites. Cobcquid Mountains &c. 

 2. Limonite veins of East River, Pictou. 3. Limonite of Shubenacadie, 

 Old ]iarns, and Brookfield. 4. Iron veins of the Triassic trap. Mag- 

 netite and specular iron in great beds of trap, associated with the 

 Triassic Red Sandstones of the Bay of Fundy. G. A. L. 



i2 



