126 
BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 146. 
Petrology — Continued. 
Minnesota. 
Basic rocks of the Lake Superior region, 
Bayley, 32. 
Dikes containing huronite, Barlow, 28. 
Mineral alterations in the granitic rocks of 
the Northwestern States, Hall, 182. 
Minnesota minerals, Berkey, 44. 
Structure of gabbro and on troctolyte, Elft" 
man, 129. 
Missouri. 
Granite rocks of Missouri, Keyes, 267. 
Paleozoic eruptive in Missouri, "Winslow, 
566. 
Secular decay of granitic rocks, Keyes, 259. 
Montana. 
Absarokite-shoshonite-banakite series, Id- 
dings, 233. 
Eruptive rocks from Montana, Merrill, G. P., 
342. 
Highwood Mountains of Montana, "Weed and 
Pirsson, 522. 
Igneous rocks of the Sweet Grass Hills, Mon- 
tana, Weed and Pirsson, 523. 
Igneous rocks of Yogo Peak, Montana, Weed 
and Pirsson, 524. 
Phonolitic rocks from Montana, Pirsson, 373. 
Neiv York. 
Basic rock derived from granite, Smyth, C. 
H., jr., 443. 
Crystalline limestones of the Adirondacks, 
Kemp, 244. 
Crystalline limestones of the Adirondacks, 
Smyth, C.H., jr., 444. 
Geological section of East River, New York, 
Kemp, 246. 
Granite-diorite near Harrison, N. Y., Ries,399. 
Moriah and Westport townships, Essex 
County, N. Y., Kemp, 245. 
Newly discovered dike at De Witt, N. Y., Dar- 
ton and Kemp, 110. 
Pennsylvania. 
Trap dikes in Chester County, Pa., Rand, 384. 
Rhode Island. 
Geology of Conanicut Island, R 1 ode Island, 
Collie, 89. 
Texas. 
Volcanic dust in Texas, Turn' r, 479. 
Vermont. 
Camptonite dikes near Danbyborough, Vt., 
Marsters, 314. 
Wisconsin. 
Mineral alterations in the granitic rocks of 
the Northwestern States, Hall, 182. 
Quartz keratophyre from the Baraboo Bluffs, 
Wisconsin, Weidman, 528. 
Wyoming. 
Absarokite-shoshonite-banakite series, Id- 
dings, 233. 
Miscellaneous discussions. 
Chemical and optical properties of amphi- 
boles, Lane, 281. 
Complementary rocks and radial dikes, Pirs- 
son, 372. 
Origin of Archean greenstones, Winchell, N. 
H.,560. 
Porphyry, Rickard, 386. 
Petrology— Continued. 
Rocks described. 
Absarokite, Iddings, 233. 
Amphibole, Lane, 281. 
Analcite diabase, Fairbanks, 137. 
Andesite, Cross, 102. 
Andesite, Merrill, G. P., 342. 
Anorthosite, Adams, 2. 
Anorthosite, Kemp, 245. 
Aplite, Turner, 475. 
Apoandesite, Clements, 86. 
Apophyllite, Berkey, 44. 
Augite-andesite, Merrill, G. P., 342. 
Augite-porphyrite, Matthew, W. D., 324. 
Augite-porphyrite, Merrill, G. P., 342. 
Augite-syenite-porphyry, Cross, 102. 
Augitic tuff, Turner, 475. 
Banakite, Iddings, 233. 
Basalt, Bayley, 33. 
Basalt, Lawson, 285. 
Basalt, Merrill, G. P., 342. 
Breccia, Cross, 102. 
Breccia, Lawson, 285. 
Camptonite, Marsters, 314, 315. 
Dacite, Turner, 475. 
Datolite, Berkey, 44. 
Diabase, Berkey, 44. 
Diabase, Cross, 102. 
Diabase, Lawson, 285. 
Diabase, Matthew, W. D., 324. 
Diabase, Marsters, 315. 
Diabase, Turner, 475. 
Diorite, Merrill, G. P., 342. 
Diorite, Packard, 365. 
Diorite, Smyth, C. H., jr., 444. 
Diorite, Turner, 475. 
Diorite (Quartz diorite porphyrite), Weed and 
Pirsson, 523. 
Diorite-porphyrite, Matthew, W. D., 324. 
Diorite-porphyrite, Merrill, G. P., 342. 
Dolomite, Van Hise and Bayley, 503. 
Doloritic basalt, Turner, 475. 
Enstatite andesite, Merrill, G. P., 342. 
Felsite porphyry, Matthew, W. D., 324. 
Fourchite, Marsters, 315. 
Gabbro, Bayley, 32. 
Gabbro, Elftman, 129. 
Gabbro, Kemp, 245. 
Gabbro, Smyth, C. H., jr., 444. 
Chert, Lawson, 285. 
Gneiss, Adams, 2. 
Gneiss, Kemp, 244, 245. 
Gneiss, Smyth, C. H., jr., 444. 
Granite, Collie, 89. 
Granite, Crosby, 100. 
Granite, Cross, 102. 
Granite, Day 118. 
Granite, Hall, 182. 
Granite, Hoffman, 222. 
Granite, Keyea, 251, 259, 263, 267. 
Granite, Lawson, 285. 
Granite, Marsters, 315. 
Granite, Matthews, 327. 
Granite, Merrill, G. P., 343. 
Granite, Smyth, C. H., jr., 443, 444. 
Granite, Van Hise and Bayley, 503. 
Granite, Williams, G. H.,541. 
