INDEX TO VOLUME 12 



525 



Page 

 Cabbonifebous series, Thickness of, in Mis- 

 sissippi valley 194 



— terranes, General section of, in Western 



Interior basin 377 



Caemanah beds, Cyphornis magnus from 83 



, Occurrence and character of. 83 



Caenac, Brittany, Figure showing plain 



near 48? 



— , Peneplain near 482 



Cabeaea marble, Reformation of, by press- 

 ure and temperature 456, 457 



, Rock-flow experiments on 456 



Castle, W. R., cited on eruption of Mauna 



Loa 46 



— , quoted on eruption of Mauna Loa,1899. 48, 49 

 Castle Mountain group, Occurrence and 



character of. 65 



Cavaniol groxip, Indian Territory, Charac- 

 ter and thickness of. 180, 181 



Chajibeblin, T. C, cited on character of 



rocks along the Saint Croix river 324 



features of Saint Croix valley.... 317 



Chance, H. M.,Coal Measures section in In- 

 dian Territory by 181 



Chattanooga Black shale. Erosion of, dur- 

 ing early deposition of the Waverly 428 



, (~>ccurrence, character, and thick- 

 ness of, in Kentucky and Tennessee 426 



, Phosphatic character of base of 427 



, Sandy and earthy layers at base of. 427 



, Source of material at base of. 429 



Chemical analyses, ^'ee Analyses. 



— equations for formation of metallic cop- 



per 4 



Chengwatana series, eastern Minnesota, 



Attitude and limits of 330 



, Occurrence and character of 327 



, Petrography of 331 



, Profile of. 341 



, Thickness of. 330 



Chequamegon bay, lake Superior, Geologic 



history of. 206 



, Geology of shores of. ,... 199, 210 



— Point bar. Geologic history of 209 



Cincinnati anticline. Age of 396,416,436 



, Geographic position of 396 



Claeke, F. W., cited on rock weathering 106 



Clabke, J. M., Invitation from Director of 



State Library read by 446 



— , Record of remarks by 11 



— , Resolution of thanks to 480 



— , Rudolf Ruedemann introduced by 11 



— , Title of paper by 11 



Claypole, E. W., on Committee on Rules, 



Cordilleran Section 493 



— ; Sierra Madre near Pasadena [abstract]. 494 

 Clay slates, Keewatin series of Minnesota, 



Occurrence and character of. 361 



Clements, J. Mobgan, cited on volcanic rocks 



of Crystal Falls district, Michigan 334 



— , Smyth, Bayley, and Van Hise cited on 



garnets as an evidence of metamor- 



phism ; 372 



Cliff beaches, lalte Superior, Features of... 213 

 Clinton formation, Fossils from, in Indiana, 



Kentucky, and Tennessee 437,438 



— limestone, Occurrence of, in Kentucky... 423 



, Variations of, in Tennessee 403 



Coal-beabing formations, Mississippi val- 

 ley. Extent and character of 176 



Coal Measuees, Arkansas section of. 182 



, Basal series of. in Arkansas 189 



, Conditions of deposition of Arkansas 



series of 194 



, Correlations of the general sections of. 182 



, Faunal comparisons of 183 



-, Indian Territory section of. 179 



, Iowa section of 178 



, Kansas section of. 179 



, Missouri section of 179 



LXXIV— Bdll. Geol. Soc. Am., Vol. 12, 1900 



Page 

 Coal Measuees, Lower, Thickness of, in In- 

 dian Territory 181 



, Occurrence of, at Tipton, Pennsyl- 

 vania 474, 475, 476, 477 



, Productive, in Iowa 176 



Kansas 176 



Missouri 176 



, Relations between Arkansas series of, 



and the great unconformity 192 



Mississippian series and 190 



, Stratigraphic position of, in Indian 



Territory 180 



, Subdivisions of, in Mississippi valley.. 175 



, Thickness of, in Mississippi valley 194 



, Unconformity at base of 174, 187 



Coals at Tipton, Pennsylvania, Age of. 473 



CoLDWATEB gTOup, Occurrenco, character, 



and thickness of 80 



Coleman, A. P., elected Councillor 454 



— ; Marine and freshwater beaches of On- 

 tario 129 



— , Record of remarks Vjy 464, 491 



— , Title of paper by 479 



Collie, G. L., Title of paper by 485 



— ; Wisconsin shore of lake Superior 197 



CoLOEADO, Andesitic rocks near Silverton, 



in 4 



— , Hornblende andesites near Silverton, 

 in 4, 8, 9 



— CANY'ON, An excursion to the 483 



— PLATEAU, Structure of. 240 



CoMPAEisoN of stratigraphy of the Black 



hills with that of the Front range of 

 the Rocky mountains [aVjstract] ; N. H. 



Darton 478 



CoNCENTEic weathering of diabase. Figure 



showing 329 



CoNCEETiONS, Analyses of 170 



— , Geological relations of. 165 



— , Localities showing 165 



— , Microscopy and crystallography of 170 



— , Mode of occurrence of 166 



— , Physical character of 166 



— , Relations of sand crystals to 165 



— , Views showing 165, 166, 167, 168, 169, 170 



CoNGLOMEEATES, castem Minnesota, Occur- 

 rence and character of. 325, 326, 329, 331 



Connecticut, Faults in Pomperaug River 



valley in 11 



— , Potholes in 37 



— VALLEY, Eskers in 9 



, Evidences of interglacial deposits in. 9 



Cook, Geoege H., cited on folds in New Jer- 

 sey 161 



Hardiston quartzite 151 



Trenton limestone 159 



CooLEY, L. C, quoted on changes in river 



bottoms in times of flood 486 



Co5E, E. D., cited on Cyphornis magnus 83 



CoppEB, native. Chemical equations for for- 

 mation of 4 



in Oklahoma, Origin of. 3, 4 



near Enid, Oklahoma 2 



CoBDiLLEBAN BANGES, Table of gcological for- 

 mations in 62 



— region, Phj'siographic features of. 59 



— Section, Committee on Rules for 493 



, Executive Committee of. 493 



, Officers of 493 



, Proceedings of 493 



, Register of '. 502 



— VALLEYS, Ash beds in : 277, 278 



, Bed rocks in : 279 



, Condition of. 272 



, Drainage of ; 287 



, Eflfects of deposition in 294 



, Erosion in 281 



, Exceptional types of 297 



, Fossils in torrent gravels of 277 



, Method of development of. 282, 291 



