IXDEX 



553 



Aspidorhynchus, 468*. 



Asteroidea, 381. 



Astral period, 357. 



Astrophyllites, 421. 



Astylospongia, 389, 392*. 



Asymmetric system of crystals, 10. 



Asymmetrical folds, 237* 239. 



Athyris, 401*, 402, 451. 



Atlantosaurus beds, 477. 



Atlas Mountains, 484, 496. 



Atmosphere, destructive work of, 72. 



Atolls, 170. 



Atrypa, 393, 425. 



Aturia, 504*. 



Aucella, 488, 489*. 



Augite, 2of, 198, 202, 289, 297 ; crystals 

 from Stromboli, 47. 



Augite andesite, 200 ; granite, 198 ; sye- 

 nite, 199. 



Augitite, 202. 



Auriferous gravels of California, 496, 512!. 



Au Sable Chasm, 99* 100, 308. 



Austin Limestone, 475. 



Australia, Archaean of, 360; Cambrian, 

 370 ; Carboniferous, 418 ; Cretaceous, 

 484; Eocene, 501 ; Miocene, 515; Or- 

 dovician, 377; Permian, 436; Pleisto- 

 cene mammals of, 539; Silurian of, 389. 



Australian Alps, Pleistocene glaciers of, 

 536. 



Australian barrier reef, 167*, 168*, 170. 



Avalanches, 105, 106. 



Aviadopecten, 423*, 425, 433*, 434. 



Axes of crystals, 9. 



Azoic era, 355. 



Baboon, fossil, 539. 



Bactrites, 403. 



Baadites, 489*, 490. 



Bad lands, 78, 79* 313, 317* 305, 507. 



Baler a, 432, 449. 



Bajuvaric series, 443, 447. 



Bald Mountain, 256. 



Banded veins, 266. 



Banks, limestone, 172. 



Baptanodou, 470. 



Barite, 266. 



Barnacles, 381. 



Barren Measures, Lower, 409 ; Upper, 



428, 429. 

 Barrier reefs, 170. 



Barriers, land, 353. 



Bar us, C, 43. 



Basal complex, 358. 



Basal conglomerates, 271. 



Basalt, 2oif, 279, 284 ; family, 200 ; joints 

 of, 262 ; leucite, 201 ; nepheline, 201 ; 

 olivine, 201 ; quartz, 201. 



Basaltic breccia, 203 ; tuffs, 203. 



Base-level, 73, 98^ 302 ; local, 309 ; tem- 

 porary, 309. 



Basement complex, 358. 



Basin, 235. 



Basin Ranges, 337* ; upheavals of, 519, 534. 



Bats, fossil, 506. 

 I Beaches, 119, 306 ; raised, 67, 534. 

 I Bears, fossil, 517, 522, 538. 



Beaver, fossil, 509 ; giant fossil, 538. 



Beaverdam Creek, 328. 



Bedding, cross, 223* 224; current, 224; 

 false, 224 ; horizontal and oblique, 273. 



Bedding planes, 146. 



Beeches, fossil, 486, 502, 515, 516. 



Beechy, Capt., 83. 

 i Bees, fossil, 442, 465. 



Beetles, fossil, 442, 465. 



Beheading of streams, 328, 329*. 



Belemnitella, 489*, 490. 



Belemnites, 442, 452, 467, 490, 495, 503. 



Belemnites, 463*, 4671-. 



Belief ophon, 419*, 425, 434. 



Belly River stage, 475, 48if. 



Belodon, 454*. 



Benton substage, 475, 48if. 



Bermuda, shell sands of, 127. 



Betulites, 485*. 



Binary granite, 198. 



Biotite, I9f, 193, 198, 289. 



Biotite andesite, 200, gneiss, 296. 



Birds, Cenozoic, 495 ; Cretaceous, 492 ; 

 Eocene, 503 ; Jurassic, 472 ; Miocene, 

 516. 



Bisons, fossil, 538. 



Bituminous coal, 216, shale, 208. 



Bivalves, Cambrian, 374; Carboniferous, 

 425 ; Cenozoic, 495 ; Cretaceous, 488 ; 

 Devonian, 402 ; Eocene, 502; Jurassic, 

 465 ; Mesozoic, 442 ; Ordovician, 382 ; 

 Permian, 434; Triassic, 451. 



Black Hills, 199 ; Algonkian of, 363 ; Cre- 

 taceous of, 477 ; Devonian of, 397 ; 

 Jurassic of, 461 ; Silurian of, 387. 



