TIME TERMS 665 



Page Plate 

 Time boundary terms, Relation of geologic formation names to . . . 392 



units, Definiteness of 580 



values of systems 349 



Varying values of faunal breaks 511 



Tomstown limestone 563, 618 27 



Tonoloway limestone . . 28 



Torsion in Appalachian Valley 568 



Transcontinental currents. Absence of 361, 363, 367 



Transgressing faunas 303 



Transgression, Cambrian 308 



Martinsburg-Utica shales 296 



Transgressions 303 



Chattanooga shale 307 



from the north 409 



Richmond 305 



Transition (see Contact). 



"Transition beds" 585 



Transmission inland of suboceanic thrusts 447 



Transverse axes in Appalachian Valley 562 



Trenton, Deposition of, in New York 529 



Deposition of, in Pennsylvania 567 



group 379 



limestone 383 27 



submergence 497 



Use of term 392 



Trenton-Black River formations, Interfingering of 557 



invasions. Map showing 368 



Trenton-Utica transition 310 



Triarthrus 493. 570 



becki 323, 493 



Distribution and recurrences of 296 



Triassic rocks, Deformation of 438 



Tribes Hill limestone 552, 644 



Tribune formation, Spergen fauna in 302 



limestone 476, 589 29 



Trilobites, Distribution of 504 



Trinity sandstone + 521 



Trinucleus concentricus 323, 326 



Trinucleus fauna in Oklahoma 516 



Trocholites internestriatus 654 



Trochonema exile 661 



sp. 660 



Tropidoleptus carinatus 514 



Troughs and overlaps, Map showing Appalachian 293 



Troughs, Overthrust in New York and New England 442 



Tullahoma limestone 523 29 



Tully limestone 28 



Turritoma 669 



acrea ? 654, 664 



cf . acrea 663 



