CONTENTS. V 



Page 

 Relationship of the glacial Lakes Warren, Algonquin, Iroquois and 



Hudson-Champlain (abstract) ; by Warren Upham 484 



The Iroquois Shore north of the Adirondacks; by J. W. Spencer. . 488 

 Channels over Divides not Evidence per se of glacial Lakes ; by J. 



\Y. Spencer 491 



Notes on the Geology of the Yukon Basin (abstract) ; by C. W. 



Hayes 495 



Geology of the Pribilof Islands ; by J. Stanley-Brown 496 



Session of Thursday, December 31 500 



The Gulf of Mexico as a Measure of Isostasy (abstract) ; by W J 



McGee 501 



Supposed interglacial Shell-beds in Shropshire, England ; by G. F. 



Wright 505 



The Champlain Submergence (abstract) ; by Warren Upiiam 508 



Note on the Middleton Formation of Tennessee, Mississippi and 



Alabama ; by J. M. Sapford 511 



Paleaster eucharis ; by A. H. Cole 512 



On the Structure and Age of the Stockbridge Limestone in the A 7 er- 



mont Valley ; by T. N. Dale 514 



A Contribution to the Geology of the Great Plains ; by Robert 



Hay 519 



Register of the Columbus Meeting, 1891 522 



List of Officers and Fellows of the Geological Society of America 522 



Index to Volume 3 531 



ILLUSTRATIONS. 



Frontispiece — Portrait of Alexander Winciiell 1 



Plate 1 — Penrose: Map showing the Tertiary Iron Ores in Arkansas and 



Texas 45 



" 2 — De Geer : Map of the late glacial marine Area in southern 



Sweden 65 



3 — Walcott: Silurian (Ordovician) Fish Remains from Colorado 172 



" 4 " Silurian (Ordovician) Fish Remains from Colorado 172 



5 Microscopic Sections of Silurian (Ordovician) Fish Re- 

 mains fr< >m Colorado 172 



6— -White : Map of " Big Injun " Oil Belt 216 



" 7 — Bayley : Mien (structure of Litchfieldite (2 figures) 252 



" s — Sherzer : The < ienus < Tionophyllum (7 figures) 282 



" 9 — K eyes : The Principal Mississippian Section 283 



" 10 — Hall and Sardeson : Map and Profile of southeastern Minnesot.a.. 331 



" 11 " Paleozoic Rocks of Minnesota (2 figures) 368 



" 12 "' Thin Sections of Minnesota Paleozoic Rocks 



(6 figures) 368 



" 13 — Mills: Sketch Map of pre-Mesozoic arid Mesozoic Rocks 413 



' " 14 — Hobbs : Secondary Banding in < rneiss 160 



" 15 — Cole: I'lthit*/, /• eucharis, 1 [all 513 



" Hi — Dale: Map of the Vermont Valley 514 



