954 



INDEX 



Crosby, W. O., 408 



Cross, W., 59,209, 661, 662, 684,732, 



750, 752 



Cross-bedding, 320, 321, 395, 396 

 Crossopterygians, 592, 716 

 Crushed zone, 65 

 Crust of earth, 10 

 Crustacea, Cambrian, 496 



Devonian, 577, 579, 581, 586 



Jurassic, 715 



Mississippian, 607, 612 



Ordovician, 524 



Pennsylvanian, 657 



Silurian, 553, 556, 557 

 Crustal movements, causes of, 360 



rate of, 354, 357 

 Crustal shortening, 358, 359 

 CryphaBUs boothi, 585 

 Crystals, 22 

 Ctenodonta nasuta, 527 



pectunculoides, 527 



recurva, 527 

 "Cuboides zone," 587 

 Culm, 604, 606 

 Cummins, W. F., 661 

 Gushing, H. P., 490 

 Cycadales, 650, 719 

 Cycadeoidea dakotensis, 738 

 Cycadofilicales, 649 

 Cycadofilices, 644, 944 

 Cycads, 595, 944 



Lower Cretaceous, 738 



Triassic, 691 

 Cycle of erosion, 124 



stages in, 129 

 Cyclonema bilix, 526 

 Cyphaspis christyi, 553 

 Cypress sandstone, 597 

 Cypricardella bellistriatus, 585 

 Cyrtina hamiltonensis, 581 

 Cyrtoceras neleus, 525 

 Cyrtolites ornatus, 526 

 Cystoids, Cambrian, 499 



Ordovician, 532 



Silurian, 548 



Dacite, 83 



Dadoxylon pennsylvanicum, 619 

 Dsedicurus clavicaudatus, 921 

 Dakota formation, 629, 746, 747 

 Dall, W. H., 774, 776, 795, 797, 798, 



805, 827, 845, 855, 918 

 Dalmanella testudinaria, 528 

 Daly, R. A., 172 

 Dana, J. D., 303, 366, 393, 426, 885, 895 



Danian series, 757 



Daniell, A., 363 



Darton, N. H., 661, 704, 797, 798, 



905 



Darwin, G. H. ? 345, 420 

 Daubree, G. A.-, 408 

 David, W. E., 492, 575 

 Davidson, G., 934 

 Davis, B. M., 205 

 Davis, C. A., 334 

 Davis, W. M., 90, 171, 191, 236, 662, 



777, 832, 866, 884, 895 

 Dawson, G. M., 485, 601, 685, 734, 



775, 812, 884 

 Dawson, J. W., 654, 884 

 Dead Sea, 336 

 Dean, B., 617 



Debris in ice, and erosion, 254 

 Deccan, lava-flow of, 364, 758 

 Declivity and erosion, 149 

 Deep-sea deposits, 316, 326-331 



absent in land, 331 

 Deeps, 355 



Deep-seated deformation, 479 

 Deer, Miocene, 820 

 Deformation, cause of submergence, 

 479 



of rocks, 400 

 DeGeer, Baron, 912 

 Degradation, 2 



in sea, 296 

 Dehydration, 49, 51 

 Deiphon forbesi, 553 

 DeLapparent, A., 573 

 Delaware Water-Gap, 158 

 Delesse, A., 201 

 Dells of the Wisconsin, 321 

 Delta of Colorado River, 190 



Mississippi River, 186 



Nile, 188 

 Deltas, 178, 188 

 Dendrocrinus polydactylus, 5.' -50 

 Density of earth, changes in, 3(i() 

 Dentalium attenuatum, 827 

 Deoxidation, 49 

 Deposition along shores, 309 



of mineral from solution, 205 



of sediment, causes of, 177 

 Derbyia crassa, 658 

 Deroceras subarmatum, 712 

 Desert Sandstone, 758 

 DCS Moines series, 621 

 Devonian climate, 575 



faunas, 575-593 



floras, 593, 594 



