684 



INDEX. 



Eurypterids, Devonian, 480, 490 

 Eurypterus, 412 



fischeri, 413 

 Eusthenerpteron, 488 

 Evolution, expansional and re- 

 strictive, 399 

 Explosion, origin of nebulas, 21 

 Explosive elasticity of sun, 55 



Farrington, O. C, cited, 23, 25, 



26, 29, 30, 120 

 Faulting, normal, 235 . 

 Favosites gothlandica, 409, 457 



occidens, 406 



Silurian, 407 

 Fenestella, 405 



emaciata, 471 



parvulipora, 406 

 Ferns, Devonian, 493 



Mississippian, 537 

 Filicales, Carboniferous, 593 



Pennsylvanian, 592 

 Fishes, Carboniferous, 614 



Devonian, 486 



Helderbergian, 457 



Mississippian, 533 



Onondagan, 460 



Ordovician, 347 



Oriskany, 459 



Permian, 652 



Silurian, 409, 417 

 Flattop schist, 152 

 Flaxseed iron ore, 377 

 Fletcher, H., cited, 504 

 Foerste, A. F., cited, 280, 335, 



544, 549 

 Folding, location of, 127 



periodicity of, 128 

 Foliation zone, 130 

 Forbesicrinus wortheni, 525 

 Ford, S. W., cited, 280 

 Fordilla troyensis, 284 

 Foreign Ordovician, 338 

 Forests, Devonian, 493 

 Fossil iron ore, 377 

 Freeh, F., cited, 271 

 Free-molecular nebulae, 41 

 Fresh- water life, Permian, 652 



mollusks, Devonian, 490 



plants, Devonian, 490 

 Fuller, M. L., cited, 433, 509, 557 

 Fundamental gneiss, 142 

 Fusion, selective, 102 

 Fusulina cylindrica, 618 



secalius, 616 



limestone, 587, 618 



Gallatin limestone, 153 

 Gangamopteris cyclopteroides, 



645 

 Ganoids, Devonian, 461 

 Gas and oil of the Devonian, 440 

 Gaseous center of earth, 9 



spheroids, formation of, 5 

 Gases in igneous rocks, 95 



in meteorites, 95 

 Gastropods, Cambrian, 297 



Carboniferous, 615, 616 



Chemung, 478 



Devonian, 473, 477 



Gastropods, Genevieve, 532, 533 



Helderbergian, 454 



Kinderhook, 520, 521 



Mississippian, 525 



Onondagan, 466 



Ordovician, 353, 354 



Permian, 653 



Silurian, 403, 406 



Upper Cambrian, 299, 300 

 Geikie, Sir A., cited, 158, 215, 

 269, 339, 340, 445, 447, 

 448, 514, 515, 517, 566, 585, 

 588, 589, 626, 632 

 Genesee formation, 432 

 Genevieve blastoidea, 532 



brachiopods, 531, 532 



bryozoa, 531, 532 



cephalopods, 532, 533 



corals, 530 



crinoids, 530, 532 



fauna, 529 



gastropods, 532, 533 



mollusks, 533 



pelecypods, 532, 533 



productus, 531 



protozoa, 531, 532 

 Geographic changes during Mid- 

 dle Devonian, 430 



features of the Permian glacial 

 stage, 675 

 Geologic time divisions, table of, 



160 

 Georgian series, 219, 241 

 Gilbert, G. K., cited, 382 (and 



Putnam), 236 

 Ginkgos, Carboniferous, 601 



Devonian, 493 

 Girty, G. H., cited, 510, 553, 



563, 623 

 Glacial beds, Cambrian, 272 



Carboniferous of Europe (?), 

 587 



India, Permian, 634 



Permian, 632 



South Africa, 635 

 Gladeville sandstone, 559 

 Glossopteris, 603 



angustifolia, 645 



communis, 645 



flora, 602, 645, 646 

 Glyptocrinus decadactylus, 359 

 Glyptocystis multiporus, 359 

 Gomopteris, 644 

 Gomphoceras, Onondagan, 466 

 Gondwana system, 634 

 Goniatites, 465 



kentuckiensis, 532 



vanuxemi, 471, 473 

 Gonophyllum pyramidale, 406 

 409 



Silurian, 407 

 Gould, C. N., cited, 543, 621 

 Gradation and submergence, 231 

 Grainger formation, 559 

 Grammysia hannibalensis, 520 

 Grand Canyon series, 153 

 Grand'Eury, C, cited, 598 

 Grand Rapids formation, 504 

 Granite, crushing strength o. 

 127 



Graptolites, 457 



Cambrian, 286 



Helderbergian, 457 



Ordovician, 344, 362 



Silurian, 408 

 Great basin area, Devonian fauna 

 of, 479 



Mississippian fauna of, 527 

 Great Britain, coal of, 586 

 Greenalite, 189 

 Greenbrier formation, 500 



limestone, 502, 558, 559 

 Greenland, Ordovician of, 342 

 Gregory, H. E. (and Williams), 



cited, 434 

 Griswold, L. S., cited, 320 

 Guelph dolomite, 370, 377, 385 



fauna, 389 

 Guernsey formation, 209 

 Gumbel, C. W., cited, 159, 215 

 Gunflint forrration, 190 

 Gunnison forrr.ation, 154 

 Gurley, R. R., cited, 345 

 Guyandot sandstone, 559 

 Gymnosperrrs, Devonian, 492 

 493 



Mississippian, 537 

 Gypidula cornis, 475, 476 



galeata, 455 

 Gypsum, Mississippian, 517, 518 



Pennsylvania, 627 



Permian, 623, 628 



Salina series, 388 



Siberia, 342 



Upper Permian, 630 

 Gyroceras, 473 



duplicicostatum, 352 



Onondagan, 466 



Haast, J., cited 159 



Hall, C. W., cited, 194, 205 



Hall, J., cited, 280, 310 (and 



Whitney), 314 

 Halonia, Mississippian, 537 

 Halysites catenulatus, 367, 40$ 

 409 



Silurian, 407 

 Hamilton arthrodirans, 469 



brachiopods, 470 



bryozoans, 477 



cephalopods, 477 



corals, 470 



crinoids, 470 



echinoderms, 477 



fauna, 452, 471 

 Northwestern, 474 

 Southern, 468 



gastropods, 473, 477 



Milwaukee, 477 



pelecypods, 473, 477 



pteropods, 473 



series, 426 



sharks, 469 



trilobites, 473, 477 

 Hampton shale, 152 

 Hanbury slate, 187 

 Hannibal shales, 561 

 Harleck group, 271 

 Harpes primus, 349 

 Harris, G. F., cited, 408 



