TITLES AND ABSTRACTS OF PAPERS 171 



lies in the river valleys ; in the Cascade Mountains it is folded into the anti- 

 clines of the range, rising from sealevel on the west to a maximum of 4,000 

 feet above tide and descending on the east nearly to sealevel. This portion of 

 the Cascade Mountains, therefore, is younger than the Satsop formation. 



Presented in abstract extemporaneously. 



GEOLOGY OF THE AREA OF PALEOZOIC ROCKS IN THE VICINITY OF HUDSON 

 AND JAMES BAYS, CANADA 



BY T. E. SAVAGE AND F. M. VAN TUYL 



(Al)stract) 



The Paleozoic rocks occurring in the vicinity of Hudson and James Bays 

 include representatives of the Ordovician, Silurian, and Devonian systems. 

 The Ordovician strata of this region embrace limestones corresponding in age 

 to the Galena and the Maquoketa of the Mississippi Valley. In the Galena 

 strata there is a remarkable mingling of Galena types of fossils with genera 

 of corals usually considered characteristic of the Silurian system, and this is 

 true, also, but to a less extent of the Maquoketa fauna. In the Silurian rocks 

 of this district there occur unusually well developed domes or reefs of lime- 

 stone composed of Stromatoporoid masses, but also containing many species 

 of true corals and other fossils. The Silurian limestones found in this region 

 are all of Niagaran and possibly some of pre-Niagaran age. Devonian rocks 

 were studied only along the Moose and Abitibi rivers. In these localities rocks 

 of Upper and Middle Devonian age are present. The Upper Devonian strata 

 consist of black shale containing numerous spores of Sporangites huronensis, 

 overlying a calcareous shale yielding a few brachiopods and corals. The Mid- 

 dle Devonian rocks here correspond to the Hamilton or late Middle Devonian 

 of the Dakota or "Northwest" province. 



Presented in abstract extemporaneously by the senior anther. 



Discussion 



Prof. Erasmus Haworth : I would like to ask Professor Savage what he 

 meant by the term "Northwest," which he used a number of times. I suppose 

 he referred to some specific area ; but what area ? 



Mr. M. Y. Williams : Are there any bituminous beds in the Silurian section? 



Prof. G. H. Chadwick asked Professor ^^avage if his Niagaran section in- 

 cluded any "Cataract." 



In reply to Professor Haworth, the author remarked : The area of late Mid- 

 dle Devonic of Iowa, Manitoba, and farther northwest. 



In reply to Mr. Williams : There are none. 



In reply to Professor Chadwick: I can not state definitely until we have 

 carefully studied our fossil collections. However, from our impressions in the 

 field, I am expecting to find the Cataract formation represented in the Silurian 

 section of this region. 



