21] 



VOLUMES XXI--XXX. 



517 



Geology — 



Economic Geol. of India, Ball, iv, 151. 

 Elevations, supposed, on the New 



England Coast, i, 77. 

 Eocene of Wyoming and New Mexi- 

 co, iii, 324. 

 Eozoon, controversy on, iii, 418. 

 Erian, see Devonian. 

 Esker, on the term, Kinahan, ix, 135. 

 Euphoberia, Scudder, i. 182. 

 Eureka district, Walcott, ix, 416. 

 Fjurypterida?. Carboniferous, Hall, ix. 



69. 

 Eurypterus, new, .iii, 151, 213 ; ix, 69. 



from near Buffalo, iii, 418. 

 Exploration of Wyoming, For wood, vi, 



241. 

 Fades Geologiques, Benevier, ix, 262. 

 Fseroe Islands, iv, 152. 

 Faulting, Becker's theory of. Browne. 



viii. 348. 



impact friction and, Becker, xxx, 



116, 194, 244. 

 Faults, origin of. McGee, vi, 294. 

 Fishes, Devonian, Whiteaves, i, 494. 

 Flora, fossil, general work on by 



Stur, xxx, 80. 



see further under Plants. 

 Florida, geology of, Smith, i, 292. 

 see also under Florida. 

 reefs, Agassiz, vi, 408 ; xxx, 178. 

 Footprints, human, in Nicaragua, vii. 



239. 



supposed human, Marsh, vi, 139. 

 Foraminifera, on fossil, T. R. Jones. 



iv. 69. 

 Fossils, why are they absent from pre- 



Cambrian strata, xxx, 78. 



a criterion of geological equiva- 

 lency, viii, 315. 



molluscan of Syria, vii, 490. 



in metamorphic rocks, i, 78, 327, 



405; iv. 148; v, 234; vii, 69; 



(Prime). 

 Frenchman's Bay, Maine, iii, 64. 

 Frost, action of in arrangement of 



earthy materials, i, 345. 

 Fulgurites, viii, 252 ; ix, 415. 

 Gaspe peninsula, rocks of, xxx, 242. 

 Gastornis Klassenii, xxx. 318. 

 Geodes, origin of, Dana, xxx. 376. 

 Geodizecl fossils, Worthen, xxx, 376. 

 Geologische Briefe, vom Rath, viii, 40 1 . 

 Geysers of California, iv, 23 ; v, 424 ; 



vi. 1. 



Yellowstone Park. v. 104, 351 ; vi, 



241. 243. 

 Glacial, see Glacial. 

 Glyptocrinus, v, 255; vi, 105. 

 Gold in Bi'azil, Derby, iii. 178; viii. 



440. 



Geology — 



Graptolites, Utica slate, Booth, vi, 380. 

 Gravel, hillocks of angular, Chamber- 



lin, vii, 378. 

 Gravels, Delaware, Chester, vii, 189 ; 



ix, 36. 

 Green River group in Montana. White, 



v, 411. 

 Grezzoni of Italy, ii, 488. 

 Gulf of Mexico, i, 288; ii, 58. 

 dimensions of, viii, 320. 

 former connection of, with Pacific 

 Ocean, vii, 157. 

 Gypsum deposits, Williams, xxx, 212. 

 Hippotherinm, Florida, Leidy, ix, 418. 

 Hoplocrinus and Hybocrinus, Wachs- 



muth and Springer, vi, 365. 

 Ice, see Glacier. 

 Idiostroma, Winchell, xxx, 317. 

 Insects, Carboniferous, Scudder, viii, 

 470; ix, 418. 



Devonian, Scudder, i, 111. 

 Triassic, Scudder, viii, 199. 

 Irish Elk, deposits containing, ii, 408. 

 Iron ore of Centre Co., Penm, viii, 

 397. 



ores of Cuba, Kimball, viii, 416. 

 of Marquette district, ii, 320, 

 402, 403. 



of Mexico, SiUiman, iv, 375. 



of Rhode Island, ii, 152. 



origin of, Arch&ian,N'ewbei~ry. 



i, 80 ; v, 476 ; Wadsworth, ii, 152, 



320, 402, 403 ; Julien, v, 476; Gham- 



berlin, vii, 147. 



origin of limonite, Dana. viii. 

 398. 

 Itacolumite, flexibility of, Derby, viii. 



203. 

 Jasper beds of Tuscany, i, 407. 



of iron ore beds, Wadsworth, ii, 

 403. 

 Jointed structure, Gilbert, iii, 25 ; iv, 

 50 ; vii, 47 ; Kinahan.- iv, 68 ; v. 

 476; McGee, v, 152. 



in clay and marl. LeGonte. 

 hi, 233. 

 Joints, in strata, near Paris, iii, 63. 

 Jurassic strata of America, White, ix, 



228. 

 Jura-trias of Easteru North America. 

 Dana, v, 383, 474. 



of S. W. Colorado, iii, 243. 

 Kame, see Glacial. 

 Kansas. Carboniferous. Broadheacl. ii. 



55. 

 Kaolin from quartzyte, Dana, viii, 449. 

 Kaolinization, Barus, xxx, 163. 

 Kettle-holes near Wood's Holl. Mass.. 

 Koons, vii. 260 ; ix, 480. 



at New Haven. Dana, vii. 113. 



