DARTON.] 



NOETH AMERICAN CtEOLOGY. 



751 



Petrography— Continued. 



1887, Copper ores of the Southwest, 



Wendt. 



California rocks, petrographlc 

 notes, Schuster. 



Texture of massive rocks, Becker. 



Latest volcanic eruption in Cali- 

 fornia, Diller. 



Peridotite of Elliott County, 

 Ky., Diller. 



Northeastern Minnesota, Win- 

 ch ell, A. 



Cortland rocks, Harker, Williams, 

 G.H. 



Eozoonal rock of Manhattan 

 Island, Gratacap. 



Kersantite at Croton, Newberry. 



Norites of the Cortland series, 

 Williams, G. H. 



Serpentines of Staten Island, 

 Gratacap, Britton, N. L. 



Serpentine of Syracuse, Williams, 

 G.H. 



Eeport on Rainy Lake region, 

 Lawson . 



1888. Peridotites, North Carolina and 



Oregon, Diller. 



Nickel Mountain, Oreg. (perido- 

 tite), Merrill, 6. P. 



Serpentine of southeastern Penn- 

 sylvania, Chester. 



Audesite, Cerro de Pasco, Peru, 

 Hodges. 



Contact phenomena, in South 

 Carolina, Richards. 

 • Obsidian cliff, Yellowstone Park, 



Iddings. 



Nickel ores from Oregon, etc., 

 Clarke, F. W. 



Ore of Treadwell mine, Alaska, 

 Adams, P. D, 



Primary quartz in basalt. Id- 

 dings. 



Building stones, California, Jack- 

 son, A. W. 



Lithology of wall rocks, Atwood. 



Mono County, Whiting. 



Quicksilver deposits of Pacific 

 Slope, Becker. 



Diabase dikes of Rainy Lake, 

 Lawson. 



Drift of central Ontario, Cole- 

 man. 



Huronian near Sudbury, Bonney 



MichipicotenBay, Herrick, Tight 

 and Jones. 



Petrography — Continued. 



1888. Original Huronian region, Win- 

 chell, N. H. 



Canadian rocks containing scap- 

 olite, Adams and Lawson. 



Synopsis of Rosenbusch's new 

 scheme. Bay ley. 



Eruptive rocks from Custer 

 County, Colo., Cross. 



Paramorphic origin of certain 

 minerals, Cross. 



Phonolite from Colorado, Cross. 



Enlargement of augites in peri- 

 dotites from Little Deer Island, 

 Me., Merrill, G. P. 



Rocks near Ilchester, Md., Hobbs. 



Dike of diabase in Boston basin, 

 Hobbs. 



Metamorphism of eruptives on 

 south shore of Lake Superior, 

 Williams, G. H. 



Some norites and gabbros, Her- 

 rick, Clarke and Deming. 



Spotted rocks from Pigeon Point, 

 Bayley. 



Archean geology of Missouri, 

 Haworth. 



Report, California division, 

 Becker. 



Contact metamorphism produced 

 by Cortland series, Williams, 

 G.H. 



Dikes of Hudson River High- 

 lands, Kemp. 



Diorite dike at Forest of Dean, 

 Kemp. 



Gabbros and diorites of the Cort- 

 land series, Williams, G. H. 



Rosetown extension of the Cort- 

 land series, Kemp. 



Geological and mineralogical 

 notes, Sears. 



Relations of Keweenawan, Torch 

 Lake, Mich., Wadsworth. 



Relations of conglomerate and 

 slate in Boston basin, Crosby. 



Theories of ore deposits. Wads- 

 worth. 



Supposed fossil from copper rocks 

 of Lake Superior, Wadsworth. 



Olivine diabase from St. George, 

 Diokerman and Wadsworth. 



Rooks of Thunder Bay district, 

 Bayley. 



Rocks from Yukon district, 

 Adams, F. D. 



