642 



BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Page 

 Post-glacial uplift of the New England 



coastal region: H. L. Fairchlld... 89 



— waters in Hudson-Cbamplain Valley . 90 



Potash slates 112 



PoTTSviLLE formation of Maryland.... 571 



Precambrian of the Adirondacks 155 



Presidential address by F. H. Knowl- 



ton ; Climates of the past 151 



Presentation of geologic information 

 for engineering purposes ; T. W. 

 Vaughan 79 



Prevailing stratigraphic relationships 

 of the bedded phosphate deposits of 

 Europe, North Africa, and North 

 America 104 



Price, W. A., Jr., C. K. Swartz, and 

 H. Bassler ; Coal Measures of 

 Maryland 567 



— - — ; Stratigraphy and correla- 

 tion of the Coal Measures of Mary- 

 land 154 



Principles in the determination of 



boundaries ; A. P. Brigham 105 



Proceedings of the Tenth Annual Meet- 

 ing of the Paleontological Society, 

 held at Baltimore, Maryland, De- 

 cember 28, 1918 ; R. S. Bassler, 

 Secretai-y 143 



Thirty-first Annual Meeting of 



the Geological Society of America, 

 held at Baltimore, Maryland, De- 

 cember 27-28, 1918 ; E. O. Hovey, 

 Secretary 1 



Prosser, C. S., cited on Sherburne sand- 

 stone 424, 426 



— , Dedication of paper to 423 



Protochoanites, Relation of the Holo- 



choanites and Orthochoanites to. . . 148 



PROUTy, W. F. ; Crystalline graphite de- 

 posits of Alabama 112 



— ; Further evidence of the age of the 

 crystalline and semi - crystalline 

 rocks in Alabama 113 



PsYCHOzoic period, Inclusion in the 



Pleistocene of the 149 



Publication rules of the Society 138 



Quicksilver deposits 112 



Radioactive heat 544 



RAvaiOND, Percy, cited on Coal Meas- 

 ure section of Maryland 582, 586 



Reagan, A. B., cited on Supai fauna. . . 492 

 Recent earthquakes of Porto Rico ; 



H. F. Reid and S. Taber 83 



Red WALL limestone 491 



Register of Baltimore meeting. . . . 117, 158 

 Reid, Clement, cited on Pliocene flora. 536 

 Reid. Eleanor M., cited on Pleistocene 



flora 536 



Reid, H. F., cited on geologic climates. 547 



— and S. Taber ; Recent earthquakes 



of Porto Rico 83 



Relation of the Holochoanites and the 

 Orthochoanites to the Protochoa- 

 nites and the significance of the 



Bactritidae ; A. W. Grabau 148 



Relative eflBciency of normative and 

 modal classifications of igneous 



rocks ; E. B. Mathews 91 



Remarkable persistence of thin hori- 

 zons ; G. H. Chadwick 157 



Report of Auditing Committee 95 



— of Paleontological Society.. 151 



Committee on Publication of Map 



of Brazil 76 



the Council 4 



of Paleontological Society . . 144 



Editor 9 



Photograph Committee 76 



Page 



Report of the Secretary 4 



of Paleontological Society . . 144 



Treasurer 7 



• — of Paleontological Society. , . 145 



Research Council, Division of Geology 



and Geography in the 166 



Resser, C. E., appointed on Auditing 



Committee ^ 146 



Rhode Island. Glacial lake plains in . . 631 



— • — , Sand-plains of 626 



Richardson, G. B., cited on Coal Meas- 

 ure sections 586 



RiES, H. ; High-grade clays of the United 



States 95 



Riggs, E. S.. cited on Camarasaurus . . . 386 



Rio de Janeiro, Geology of 299 



Rio Grande do Norte. Geology of 304 



Rio Grande do Sul. Geology of 306 



Rock products and the war ; G. F. 



Loughlin 97 



Rogers, A. F., Reference to war work 



of 184 



Rogers, H. D,. cited on New England 



submergence 598 



Ryder, John, Reconstruction of Cama- 

 rasaurus by 380 



Salisbury, R. D., Reference to war 



work of 180 



Sand-chrome deposits of Maryland ; 



J. T. Singewald, Jr Ill 



Santa Catharina, Geology of 313 



Sao Paulo, Geology of 316 



Sauropods of Cope, Camarasaurus, 



Amphicoelias, and other 379 



Sauropoda, Restoration of Cope's 151 



Savage, T. E., and F. M. Van Tuyl ; 

 Geology and stratigraphy of the 

 area of Paleozoic rocks in the 

 vicinity of Hudson and James bays 339 



— cited on Chemung fauna 465 



Silurian of Hudson Bay region 367 



Saylorsburg, White clays at 96 



Schloesing, , cited on geologic cli- 

 mates 557 



Schuchert, Charles, cited on geologic 



climates 509 



Jurassic climate 520 



Morrison formation 381 



Ordovician of Frobisher Bay . . 343 



Supai fauna 492 



shales 491 



Scudder, S. H., cited on Permian ele- 

 ments 593 



Secretary-'s report 4 



Sections of Coal Measures in Mary- 



„ land 578-582 



Sergipe, Geology of 321 



Severn River limestone 367 



Sextant sandstone and shale 375 



Shaler, N. S., cited on New England 



submergence 598 



Shammatawa limestone 352 



— River, Ordovician section and fossils 



on 349 



Shaw. E. W., Mexican petroleum and 



the war io9 



Sherburne sandstone '.'.'.'. 423 



, Fossils from 427 



Shimer, F. H., cited on Kaibab lime- 

 stone 493 



Shimer, H. N. ; Permo-Triassic of north- 

 western Arizona 155 471 



Signal Corps School of Meteorology; 



O. L. Fassig 106 



Significance of the Sherburne sand- 

 stone in Upper Devonic stratigra- 

 phy ; A. W. Grabau 423 



SiLExiTE dikes of New York 93 



Silurian floras * 507 



