IV BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Page 



Editor's report 451 



Librarian's report 452 



Election of officers 453 



Memoir of Franklin Piatt [\vithbiblioo;raphy] ; by Persifor Frazer. 454 

 Experimental work on the flow of rocks [abstract! ; by F. D. Adams. 455 

 Geomorphogeny of the Klamath mountains [abstract] ; by J. S. 



Diller 461 



Tufl' cone at Diamond head, Hawaiian islands [abstract] ; by C. H. 



Hitchcock 462 



Hypothesis to account for the extra-glacial abandoned v^alleys of the 



Ohio basin [abstract, with discussion] ; by M. R. Campbell 462 



The alleged Parker channel ; by E. W. Williams, Jr 463 



Origin and age of an Adirondack augite syenite [abstract] ; by H. P. 



Gushing 464 



Session of Friday, December 28 464 



Eleventh annual report of the Gommittee on Photographs 465 



Laurentian limestones of Baffiuland [abstract] ; by Robert Bell. . . 471 

 Points involved in the Siluro-Devonian boundary question [abstract] ; 



by H. S. Williams 472 



Age of the coals at Tipton, Blair county, Pennsylvania; by David 



White 473 



Gomparison of stratigraphy of the Black hills with that of the Front 



range of the Rocky mountains [abstract] ; by N. H. D vrton 478 



Session of Saturday, December 29 479 



Recommendations by the Gouncil 479 



Peneplains of Gentral France and Brittany [abstract] ; by W. M. 



Davis 480 



An excursion to the Colorado canyon [abstract] ; by W. M. Davis. . 483 

 Note on river terraces in New England [abstract] ; by AV. M. Davis. 483 

 Landslides of Echo and of Vermilion cliffs [abstract] ; by R. E. Dodge. 485 



River action phenomena ; by J. E. Todd 486 



Fort Gassin beds in the Galciferous limestone of Dutchess county, 



New York [abstract] ; by W. B. Dwight 490 



Register of the Albany meeting, 1900 492 



Session of Gordilleran Section, Friday, December 28 493 



Evidences of shallow seas in Paleozoic time in southern Arizona 



[abstract] ; by W. P. Blake 493 



Sierra Madre near Pasadena [abstract] ; by E. W. Glaypole 494 



Drainage features of Gal ifornia [abstract] ; by A. G. Lawson 495 



Description of Bates hole, Wyoming [abstract] ; by W. G. Knight. . 495 

 Geological section through John Day basin [abstract] ; by J. G. 



Merriam 496 



Session of the Gordilleran Section, Saturday, December 29 497 



Geology of the Great basin in Galifornia and Nevada [abstract] ; by 



H. W. Turner 498 



Geology of the Three Sisters, Oregon [abstract] ; by IL W. Fairbanks. 498 

 Sketch of the pedological geology of Galifornia [abstract] ; by E. W. 



Hilgard 499 



