BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



VOL. 24, PP. 625-668 DECEMBER 26, 1913 



INDEX TO "REVISION OF THE PALEOZOIC SYSTEMS" * 



BY E. 0. ULRICH 



"Revision of the Paleozoic Systems" was printed as pages 281-680 of 

 volume 22 of the Proceedings of the Geological Society of America, and 

 the page and plate numbers given in the "Index" refer to that volume. 



Page Plate 

 Acadian 616 



faunas and deposits 619 



Acrotreta ; 493 



microscopica 623 



Actinoceras 503 



Adirondack Island 332 



Oscillations of 415 



uplift 414 



Adirondackia 339 



Agnostus 493 



Alabama basin 562, 564, 566 



formations . . 27 



Allegheny basin , m 562 



formations '. . . . . 29 



front 



Allentown formation 



limestone 



American Paleozoic stratigraphic column, History of development 



of 



Amphion salteri ? 



Amsterdam limestone, New York 



Anamosa . 



Angular unconformity, illustration 



Antecedent occurrences of faunas 



Antietam sandstone 



Aparchites 057 



Apison shale 



Appalachia, Geologic history of 336, 436, 439, 440, 471, 476, 483, 



512, 565, 572, 573 

 Appalachian and Allegheny geosynclines, Subdivision by transverse 



axes of 562 



Appalachian belts of folding, Inland migration of 485, 1 L6 



Areas of late Cincinnatian erosion in northern 311 



Cause of inland migration of 439 



563 





644 



27 



375 



26 



653 





390 



27 





28 



451 





594 





618 



27 



663 





618 



27 



Prepared for the the author by Mr. John M. Nickles, of the U. S. Geological Survey. 



(625) 



