CONTENTS 3 



Page 



Relation between occurrence and quality of petroleum and broad 

 areas of uplift and folding [abstract] ; by Eugene Wesley Shaw 87 



New points in Ordovician and Silurian paleogeography [ab- 

 stract] ; by T. E. Savage and Francis M. Van Tuyl 88 



Dating of peneplains : an old erosion surface in Idaho, Montana, 

 and Washington — is it Eocene? [abstract and discussion] ; by 

 John L. Rich 89 



Iron formation on Belcher Islands, Hudson Bay, with special 

 reference to its origin and its associated algal limestones [ab- 

 stract] ; by E. S. Moore 90 



Titles and abstracts of papers presented before the afternoon session 



of Friday 90 



• Subprovincial limitations of Precambrian nomenclature in the 

 Saint Lawrence Basin [abstract and discussion] ; by M. E. 

 Wilson 90 



Further studies in the New York Siluric [abstract] ; by George H. 

 Chadwick 92 



Relations of the oil-bearing to the oil-producing formations in the 

 Paleozoic of North America [abstract] ; by Amadeus W. Grabau 92 



Revision of the Mississippian formations of the upper Mississippi 

 Valley [abstract] ; by Stuart Weller and Francis M. Van Tuyl. 93 



Notes on the stratigraphy and faunas of the Lower Kinderhookian 

 in Missouri [abstract] ; by E. B. Branson 93 



Meganos group, a newly recognized division in the Eocene of Cali- 

 fornia [abstract] ; by Bruce L. Clark 94 



Age of the Martinsburg shale as interpreted from its structural 

 and stratigraphical relations in eastern Pennsylvania [ab- 

 stract] ; by F. F. Hintze 94 



Invertebrate fauna of the Grassy Creek shale of Missouri [ab- 

 stract] ; by Darling K. Greger 95 



Some definite correlations of West Virginia coal beds in Mingo 

 County, West Virginia, with those of Letcher County, south- 

 eastern Kentucky [abstract] ; by I. C. White 96 



Records of three very deep wells drilled in the Appalachian oil 

 fields of Pennsylvania and West Virginia [abstract and discus- 

 sion] ; by I. C. White 96 



Tentative correlation of the Pennsylvania strata in the eastern 

 interior, western interior, and Appalachian regions by their ma- 

 rine faunas [abstract] ; by T. E, Savage 97 



Precambrian rocks in the Medicine Bow Mountains of Wyoming 

 [abstract] ; by Eliot Blackwelder and H. F. Crooks 97 



Geologic map of Brazil [abstract] ; by John Casper Branner 98 



Notes on the geology of the region of Parker Snow Bay, Green- 

 land [abstract] ; by Edmund Otis Hovey 98 



Annual dinner 98 



Session of Saturday, December 29 98 



Titles and abstracts of papers read before the Saturday morning ses- 

 sion 99 



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