302 INDEX TO NORTH AMERICAN GEOLOGY, PALEONTOLOGY, [bull. 189. 
Petrology— Continued . 
Canada— Continued. 
Rockland quarries (limestone), Ami, 85. 
Rocks from Labrador, Ferrier, 1816. 
Rocks from the Kamloops map sheet, Ferrier, 
1813. 
Sudbury, microscopical character of rocks 
from, Williams, G. H., 6159. 
Sudbury nickel district, Walker, 5825. 
Syenite gneiss from the apatite region, Gor- 
don, 2066. 
Volcanic rocks from Temiscouata Lake, Que- 
bec, Gregory, 2167. 
Volcanic rocks of the maritime provinces of 
Canada, Matthew, W. D., 3800. 
Central America. 
Occurrence of theralite, Wolff, 6407. 
Colorado. 
Analcite-basalt, Cross, 1197. 
Andesite rocks near Silverton, Van Horn, 6548. 
Description of igneous formations, Cross, 1188. 
Elmoro folio, Hills, 2598. 
Geology of Aspen mining district, Spurr, 5175. 
Geology of Cripple Creek, Colo., Cross, 1190, 
1192. 
Geology of Silver Cliff and Rosita Hills, Cross, 
1191. 
Geology of the Denver Basin, Emmons, Cross, 
and Eldridge, 1707. 
Geology of the Rico Mountains, Colorado, 
Cross and Spencer, 1206. 
Granite breccias of Cripple Creek, Stone, 5254. 
Granite breccias of Grizzly Peak, Stone, 5256. 
Granitic rocks of the Pikes Peak quadrangle, 
Mathews, 3742. 
Granites of Pikes Peak, Colorado, Mathews, 
3733. 
Igneous rocks of the Telluride district, Colo- 
rado, Cross, 1193. 
Intrusive sandstone dikes in granite, Cross, 
1189. 
Laccolites in Colorado, Gilbert, 2001. 
Pikes Peak folio, Cross, 1187. 
Sandstone dikes of Ute Pass, Colorado, Crosby, 
1163a. 
Series of peculiar schists, Cross, 1184. 
Telluride folio, Cross, 1201. 
Tenmile folio, Emmons, 1712. 
Tourmaline-schists, Patton, 4260. 
Walsenburg folio, Hills, 2599. 
Connecticut. 
Acid dike in Triassic area, Hovey, 2770. 
Basic dike in Connecticut Triassic, Griswold, 
2196. 
Granite-gneiss in Connecticut, Westgate,6018. 
Quartz vein at Mystic, Conn., Kemp, 2995. 
Triassic formation of Connecticut, Davis, 1364. 
District of Columbia. 
Disintegration of the granitic rocks of the 
District of Columbia, Merrill, G. P., 3952. 
Florida. 
Geology of southern Florida, Griswold, 2200. 
Guatemala. 
Kenntniss der jungen Eruptivgesteine der 
Guatemala, Bergeat, 423. 
Georgia. 
Metamorphic rocks around Dahlonega, Wa1 
son, 5888. 
Petrology— Continued. 
Hawaiian Islands. 
Lavas and soils, Maxwell, 3809. 
Nepheline melilite basalt, Merrill, 3967a. 
Idaho. 
Boise folio, Lindgren, 3540. 
Extrusive and intrusive igneous rocks, Id- 
dings, 2835. 
Occurrence of copper in western Idaho, Pack- 
ard, 4237. 
The gold and silver veins in Idaho, Lindgren, 
3548. 
Indian Territory. 
Coal fields of Indian Territory, Drake, 1539. 
Geologic notes on Wichita Mountains, 
Vaughan, 5733. 
Indiana. 
Sandstones of western Indiana, Hopkins, 2736. 
Iowa. 
Sioux quartzite, Beyer, 433. 
Jamaica. 
Geology of Jamaica, Hill, 2564. 
Kansas. 
Kansas gypsum rocks, Bailey and Whitten, 
154. 
Kentucky. 
Mica-peridotite from Kentucky, Diller, 1494. 
Maine. 
Andesite of Aroostook volcanic area, Gregory, 
2165. 
Basic eruptive rocks, Merrill, 3941. 
Contribution to the geology of Maine, Gregory, 
2166. 
Dikes in vicinity of Portland, Lord, 3571. 
Dikes of Johns Bay, Bascom, 287. 
Eleolite-syenite and hornblende-syenite, Bay- 
ley, 301. 
Fulgurite, Bayley, 305. 
Geology and petrography of Monhegan Island, 
Maine, Lord, 3574. 
Spherulitic volcanics at North Haven, Me., 
Bayley, 313. 
Volcanic series in Maine, Smith, 5025. 
Maryland. 
Acidic eruptions of Maryland, Keyes, 3080. 
Allanite and epidote, parallel intergrowths 
of, Hobbs, 2683. 
Epidote as a component of eruptive rocks, 
Keyes, 3054. 
Gabbro in Maryland, quartz-bearing, Grant, 
2105. 
Granites, American eruptive, Keyes, 3052. 
Granites, Maryland, Keyes, 3053. 
Granites of Cecil County, Grimsley, 2185. 
Granitic rocks in the Piedmont plateau, Wil- 
liams, G. H., 6166. 
Harpers Ferry folio, Keith, 2958. 
Maryland granites, Keyes, 3117. 
Metamorphosed eruptives, Hobbs, 2628. 
Origin and relations of Maryland granites, 
Keyes, 3070. 
Outline of physical features, Clark, 912. 
Secular decay of granitic rocks, Keyes, 3076. 
Volcanic rocks, Williams, G. H., 6155. 
Massachusetts. 
Acid pegmatite in diabase, Jaggar, 2876. 
Augite-syenite and nepheline-syenite, Sears, 
4904. 
