STRATIGRAPHIC TERMS 663 



Page Plate 



Stratigraphic boundaries, terms, local . 387 



time values 459 



unconformity 536 



units, nomenclature 384 



1837 to 1911 26 



Stratigraphy, a new cardinal principle of 579 



Stringtown shale 677 



Stromatocerium ? sp. undet 664 



Strophalosia truncata 596 



Structural criteria of stratigraphic classification 448 



Styliolina 593 



nssurella 596 



Submergences, Cause of 336 



Distinctness of introductory 339 



"Suboceanic spread" 340, 351, 441 



Suboceanic spreading and lateral creep of continental platform. . . 446 



Suboceanic thrusts, Transmission inland of 447 



Subulites obesus 668 



Suess, Edward, on folding 434 



views on earth deformation and displacements of strandline 404 



Sulphur Springs formation . . 29 



Sunbury shale 527 29. 



Superposition in stratigraphic correlation 505 



Sweetland shale 426 29 



Sycamore limestone 528 29 



Sylamore sandstone 455', 591 29 



Sylvan shale in Oklahoma 300, 305 28 



Sylvania sandstone 474 28 



Synchronous deposits within same basin, Lateral change in char- 

 acter of 477 



Syntrophia 671 



campbelli . 636 



lateralis 654, 661 



cf. lateralis 658, 670 



cf . palmata 670 



Syntrophiidae 663 



System and series, Bases of '. 582 



Systematic paleontology 507 



Systemic periods, Introductory events in 314 



Systems, Grouping of • ($10 



Time values of 349 



Table: east-west shifting of Ordovician sens in the Appalachian 



Valley troughs in cast Tennessee 544 



sequence of Niagara deposits in North America 560 



Taconia 485, 512 



Taconian t; 1 6 



"Taconic slates" 675 



Taconic-Saint Lawrence slate belt 67."» 



