300 INDEX TO NORTH AMERICAN GEOLOGY, PALEONTOLOGY, [bull. 189. 
Petrology— Continued. 
Wyoming. 
AJbsaroka folio, JIagne,'2236. 
Absarokite-shosrionite-banakite series, Id- 
dings, 2832. 
A.bsarokite-shoshonite-banakite series, Yel- 
lowstone National Park, Iddings, 2847. 
Age of igneous rocks of Yellowstone Park, 
Hague, 2235. 
Electric Peak and Sepulchre Mountain, Id- 
dings, 2823. 
Extrusive and intrusive igneous rocks, Id- 
dings, 2835. 
Geology of Gallatin Mountains, Iddings and 
Weed, 2852. 
Igneous intrusions in the Black Hills, Russell, 
4705. 
Igneous rocks of Absaroka Range, Iddings, 
2846. 
Igneous rocks of Electric Peak, Iddings, 2844. 
Igneous rocks of Leucite Hills, Cross, 1196. 
Igneous rocks, Yellowstone Park, Iddings, 
2834. 
Intrusive rocks of Gallatin Mountain, 
Iddings, 2843a. 
Leucite Hills, Kemp, 3000. 
Notes on rocks from Wyoming, Hill, 2.729. 
Recent basalts, Iddings, 2849. 
Tertiary volcanoes of Absaroka Range, Hague, 
2238. 
The rhyolites, Yellowstone National Park, 
Iddings, 2848. 
Volcano, a dissected, Iddings, 2827. 
Volcano of Crandall Basin, Iddings, 2845. 
Classification. 
Crystalline rocks of Missouri, Haworth, 2357. 
Syenite gneiss from the apatite region, Gor- 
don, 2066. 
List of rocks described. 
Absarokite, Iddings, 2847,2832. 
Acmite-trachyte, Wolff and Tarr, 6404. 
Actinolite-diorite, Turner, 5465. 
Actinolite-magnetite schists, Bayley, 307. 
Actinolite-magnetite schist, Elftman, 1633. 
Actinolite-schist, Turner, 5645. 
Actinolite-schist, Winchell and Grant, 6376. 
Aegirite-syenite-porphyry, Weed and Pirsson, 
5942. 
Agglomerate, Cross, 1191. 
Akerite, Gushing, 1246. 
Akerite, Washington, 5873. 
Albite-schist, Diller, 1507. 
Alnoite, Adams, 6. 
Alnoite, Ferrier, 1813. 
Alnoite, Smyth, 5077, 5085, 5091. 
Amphibole, Lane, 3385. 
Amphibole-malignite, Lawson, 3419. 
Amphibole picrite, Lewis, 3508. 
Amphibole-pyroxene rock, Turner, 5473. 
Amphibolite, Brooks, 615. 
Amphibolite, Clements, 1014. 
Amphibolite, Ferrier, 1813, 1816. 
Amphibolite, Irving, 2868. 
Amphibolite, Kemp, 2993. 
Amphibolite, Lewis, 3508. 
Amphibolite, Lindgren, 3523. 
Amphibolite, Ransome, 4543. 
Petrology — Continued. 
List of rocks described— Continued. 
Amphibolite, Turner, 5453, 5467. 
Amphibolite, Turner and Ransome, 5470, 5485. 
Amphibolite, Watson, 5888. 
Amphibolite, Westgate, 6017. 
Amphibolite, Winchell and Grant, 6376. 
Amphibolite schist, Lane, 3882. 
Amphibolite schist, Turner, 5465. 
Analcite, Pirsson, 4394. 
Analcite-basalt, Cross, 1197. 
Analcite diabase, Fairbanks, 1748. 
Analcite rock, Coleman, 1042. 
Analcitite, Bascom, 285. 
Andesite, Becker, 345. 
Andesite, Bergeat, 423. 
Andesite, Cross, 1187, 1190, 1191, 1192. 
Andesite, Diller, 1508. 
Andesite, Gregory, 2165, 2166. 
Andesite, Hague, 2236. 
Andesite, Hills, 2599. 
Andesite, Iddings, 2823, 2824, 2845, 2846. 
Andesite, Irving, 2868. 
Andesite, Keith, 2958. 
Andesite, Kemp, 2993, 
Andesite, Lindgren, 3540. 
Andesite, Merrill, G. P., 3951. 
Andesite, Ordonez, 4141, 4142, 4144. 
Andesite, Ransome, 4543. 
Andesite, Smith, 5059, 5062. 
Andesite, Tower and Smith, 5445. 
Andesite, Turner, 5453, 5465. 
Andesite, Turner and Ransome, 5470. 
Andesite, Van Horn, 6548. 
Andesite, Weed, 5940. 
Andesite, Winchell and Grant. 6376. 
Andesite-porphyry, Weed, 5946. 
Andesitic tuff, Diller, 1507. 
Andesitic tuff, Turner and Ransome, 5485. 
Anorthosite, Adams, 13, 14, 18. 
Anorthosite, Elftman, 1633. 
Anorthosite, Ells, 1641. 
Anorthosite, Ferrier, 1811, 1816. 
Anorthosite, Kemp, 2987, 2991, 2992. 
Anorthosite, Lawson, 3407, 3408. 
Anorthosite, Winchell and Grant, 6376. 
Anthophyllite, Merrill, 3953. 
Apatite, Ferrier, 1814. 
Aplite, Lindgren, 3531. 
Aplite, Lord, 3571, 3574. 
Aplite, Pirsson, 4408. 
Aplite, Spurr, 5173. 
Aplite, Turner, 5457, 5479. 
Aplite, Washington, 5875. 
Aplite, Weed, 5940, 5948. 
Aplitic granite, Weed and Pirrson, 5935. 
Apoandesite, Clements, 1013. 
Apo-andesite, Turner, 5465. 
Apobsidian, Winchell and Grant, 6376. 
Apophyllite, Berkey, 425. 
Aporhyolite, Bascom, 276, 279. 
Aporhyolite, Crosby, 1178. 
Aporhyolite, Diller, 1507. 
Aporhyolite, White, 6068. 
Aporhyolite, Winchell and Grant, 6376. 
Apotrachite, Winchell and Grant, 6376. 
Argillaceous sandstone, Kemp, 2993. 
