INDEX 



697 



Block mountains, 354. 



Blowholes, 209, 210. 



Blow-outs, 44. 



Blue grass region of Kentucky, soil 



41. 

 Blue Grotto, 229. 

 Blue mud, 241. 

 Bonnersheim, 155. 

 Bores, tidal, 202. 

 Bos, 663. 

 Bosses, 328. 



Bossons Glacier, movement of, 151. 

 Boston harbor, drumlins of, 177. 

 Bosworth, T. O., 425. 

 Bothriolepis, 462, 464. 

 Bottom-set beds, 131. 

 Bovidae, 619. 



Boulder, Montana, gold of, 371. 

 Bowlder clay, 160, 172, 173. 



trains, 172. 

 Bowlders, balanced, 155, 156. 

 Bowman, I., 43. 

 Brachiopods, Cambrian, 414-415. 



Carboniferous, 481, 482. 



Devonian, 457-458. 



Mesozoic, 526. 



Ordovician, 431-432. 



Proterozoic, 397. 



Silurian, 446-447. 



Tertiary, 626. 

 Brachiospongia digitata, 427. 

 Brachyurans, 532. 

 Braided stream, 87, 178. 

 Branchiosaurus, 487, 488. 

 Brandon, fossil plants of, 633. 

 Breakers, 200. 

 Breccia, 249. 



volcanic, 332. 

 Brenva Glacier, retreat of, 153. 

 Bridger formation, 624. 

 Brittle stars, Carboniferous, 481. 



Ordovician, 431. 

 Brontosaurus, 542-543. 

 Brontotherium, 604. 

 Broom, R., 537, 560. 

 Bryograptus, 428. 

 Bryozoans, Carboniferous, 480, 481. 



Devonian, 457, 458. 



Ordovician, 432, 433. 



Silurian, 447. 

 Buchiola retrostriata, 459. 

 Bumastus (Illaenus) ioxus, 448. 



trentonensis, 435. 



of, 



Buttes, 106, 328. 

 Byssonychia radiata, 433. 



Calabria, earthquake of, 285. 



Calamites, 496-497. 



Calcite, 687. 



Calcium minerals, 687-688. 



Calderas, 307, 308, 309. 



California earthquake, 275-276. 



Callopora elegantula, 447. 



pulchella, 432. 

 Calymene callicephala, 435. 

 Camarotcechia endlichi, 458. 

 Cambrian period, climate of, 417. 



close of, 407. 



duration of, 417. 



evolution during, 416. 



life of, 408-417. 



of other continents, 408. 



physical geography of, 405. 



plants of, 409-410. 



subdivisions of, 402. 



submergence during, 406. 



trilobites of, 402, 410-413. 



volcanic activity of, 407. 

 Cambrian rocks, character of, 406. 



location of, 402. 



present condition of sediments, 407. 



thickness of, 406. 

 Camels, Pleistocene, 672. 



Tertiary, 615-617. 

 Camptonectes bellistriatus, 527. 

 Camptosaurus, 544. 

 Canadian epoch, 422. 

 Cannel coal, 495, 501. 

 Canoe valleys, 363. 

 Canyons, 95-96. 



Cape Charles, marine erosion at, 213. 

 Cape Cod, marine erosion at, 233. 

 Cape de la Heve, erosion at, 205. 

 Carbonation, 37. 

 Carboniferous periods, 469-507. 



climate of, 503. 



life of, 480-498. 



Lower, see Mississippian. 



plants of, 491-498. 



Upper, see Pennsylvanian. 

 Carcharodon megalodon, 625, 626. 

 Cardioceras cordatum, 529. 

 Carnivores, Pleistocene, 672. 



Tertiary, 622. 

 Caryocrinus ornatus, 446. 



