AilERICA. 117 



Gilpin, Edwin. Notes on the Coal Measures and Lower Carboni- 

 ferous Strata of Western Newfoundland. Trans. N. Engl. Inst. 

 Eng. vol. xxiii. pp. 167-1 76, plate xxxv. (sketch Map). 



Account of the geology of that part of Newfoundland which lies be- 

 tween the great rauge of Laurentian hills and the sea, from Cape Ray to 

 Port-a-Port. The rocks described belong to : — 1, partly metamorphosed 

 lowest Carboniferous Conglomerates, about 1300 feet ; 2, Lower Car- 

 boniferous Marine Limestone group, with gypsum and marls, 2150 to 

 2500 feet ; 3, Millstone Grit, consisting of coarse sandstones with occa- 

 sional layers of pebbles of limestone, 6000 feet(?); 4, Middle or pro- 

 ductive Coal Measures in small patches with thin seams of good coal, 

 from 6 inches to 4 feet, 600 feet at least. G. A. L. 



. Sketch of the Carboniferous District of St. George's Bay, 



Newfoundland. Trans. Nov. Scot. Inst. (9 pp.) 



Describes part of the S. shore of Newfoundland and the adjoining 

 inland tract. There arc frequent exposures of L. Carboniferous rocks — 

 red sandstones, conglomerates, limestones, coals, and a thick bed of 

 gypsum being noticed. S. of St. George's town and 6 miles inland is 

 a spur of older rocks with an immense deposit of magnetite. The 

 action of the sea on the limestones of East Bay has formed pillars 

 and caves ; and here is a large deposit of barytes. Between East and 

 West Bays indications of petroleum occur. AV. W. 



Goldsmith, E. The Blue Gravel of California. Proc. Ac. Nat. Sci. 

 Philadel. part ii. pp. 73, 74. 



This gravel underlies the gold-bearing alluvium of California and 

 Nevada, and consists of pebbles of slate and hornblende-rock in an 

 acidic lava, with crystals of biotite and grains of gold. A. H. G. 



Hall, Prof. James. On the Eolations of the Niagara and Lower 

 Helderberg Formations, and their Geographical Distribution in 

 the United States and Canada. Proc. Amer. Assoc, vol. xxii. B. 

 pp. 321-335. 

 A protest against the view that the Niagara and Lower Helderberg 

 formations of North America arc in reality identical, and that the latter 

 formation has therefore no existence as a distinct group in the Upper 

 Silurian. From this view Professor Hall dissents ; and his paper con- 

 tains an enumeration of the more important facts, which prove the 

 Lower Helderberg group to be an independent division. H. A. N. 



Hakden, J. W. The Brown Hematite Ore Deposits of South 



^Mountain, between Carlisle, Waynesborough, and the South-eastern 



edge of Cumberland Valley. Trans. Amer. Inst. Min. Eng. vol. i. 



pp. 136-144. 



The ore, which lies along the slopes and valleys of the spurs and 



ridges of the mountain, associated with clays and sands, is the 



residue of decomposition of the slates and limestones (Silurian), and 



