XVIU . BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Parts of Volume 26 



Pagi-.s. Plates. Figures. P'"t'= ^o Price to 



Fkm.ows. Public. 



Number! 1-204 1-7 2 $2.60 $3.90 



Nainl)er2 205-294 8-9 31 1.70 2.60 



Number 3 2li5-3SS 10-24 6 1.90 2.75 



Number 4 * 389-504 25-27 2 1.35 2. 05 



Rkprints fro.m A^olume 26 



Reprints. Pages. PLAThs. Figures. Pk'Ce to Price to 



Peli.ows. Public. 



Proceedings of the Twenty-seventh 

 Auuual Meeting of the OTeolugical 

 Society of .America, held at I'hila- 

 delpliia, Fennsvivania, December 

 29, ;;0, and 31, 1914. E. O. Hovky, 

 Secretary 1-128 1-7 1-2 $1.60 |2 40 



Proceedings of tlie Fifteenth Annual 

 3Jeeting of the Cordiileran Section 

 of the Geological Society of Amer- 

 ica, held at Seattle, Washington, 

 May 21 and 22, 1914. G. D. Lou- 

 HERBACK, Secretary 129-140 .... .... 20 30 



Proceedings of the Sixth Annual 

 Meeting of the Paleontological So- 

 ciety, held at Piiiladelphia, Penn- 

 sylvania, December 29, 30, and 31, 

 1914. R. S. Bassler, (becretor?/ . . . 141-170 ... 35 55 



Isostasy and radioactivity. G. F. 



Becker ". 171-204 ... 45 65 



Diastrophic importance of the uncon- 

 formitv at the base of the Berea grit 

 in Ohio. H. P. Cushi.ng "..205-216 8 1-2 20 30 



Origin of the Red Beds of western 



Wyoming. E. B. Bkansox 217-230 9 25 40 



Origin of thick gypsum and salt de- 

 posits. E. B. Branson 231-242 1-5 20 .30 



Length and character of the earliest 

 inler-Glacial period. A. P. Cole- 

 man 243-254 .... 1-3 20 30 



Obsidian from Hrafntiniiuhryggur, 

 Iceland : its lithophysa? and sur- 

 face markings. F. E. \Vric;ht . . . 255-286 .... 1-12 60 90 



Po.st-Ordovician deformation in the 

 Saint Lawrence Valley, New York, 

 (i. H. Chadwick ! 287-294 .' . 1-9 25 40 



Close of Jurassic and opening of Cre- 

 taceous time in North America. 

 H. F. OsBORNf 295-302 .... 1 15 20 



Reasons for regarding the Morrison 

 an introductorv Cretaceous forma- 

 tion. W. T. Lice t 303-314 20 30 



Origin and distribution of the Morri- 

 son formation. C. C. MooKt 315-322 1-4 15 20 



* Preliminary pages and index are distributed with number 4. 



t Under the brochure heading is printed rEOCEEDiNGS of the Paleontologic;al Societt. 



