FORT PAYNE BASIN 641 



Page Plate 



Fort Payne basin 582 



chert 427 29 



limestone 523 



Fossil faunas, First appearance of 592 



Fossil faunas and floras 482 



Fossil marine faunas, Centers of origin and dispersal of 483 



Fossils in contacts 465 



Stratigraphy 463 



Taxonomic value of 481 



Use of, in correlation 291-292 



Foster Mountain embayment 483, 451, 459 



Fouling of seas by vegetation 359 



"Fourth magnesian limestone" 629 



Frankfort shale 27 



Freeh, F., Pacific- American basin 489 



Fredonia oolite 512 



Frog Mountain sandstone . • 28 



Fulton shale 418 27 



Fusispira bed of Prosser limestone 298, 369 



Gadsden axis 562 



barrier 564 



Galena dolomite 479, 524 27 



age 309 



formation . . 27 



Relations of, to other Mohawkian formations 524 



Gaps in stratigraphic record, Determination and correlation of . . . 331 



Garrard sandstone . . 27 



Gasconade fauna 631 



formation 631 27 



Gastropods, Distribution of 503 



Ozarkian 615 



General earth movements, Discrimination of 410 



Genesee shale . . 28 



Geneva limestone . . 28 



Geographic conditions: Ordovician- Silurian transition 437 



continuity in stratigraphic correlation 506 



distribution 498 



patterns, Recurrence of 602 



Geological period, Time value of 602 



record, Diminishing imperfections 377 



Geologic formation names, Relation to time terms of 392 



map, north-central part of Florida 431 



time, Divisions of, Criteria for 580 



time divisions, Natural basis for 292 



time, Units of measurement of 290 



Georgia shale 617 



Georgian 616 



Geosynclines 397 



