PALEOZOIC ROCKS OF THE CANTON QUADRANGLE 5/ 



Upper Cambrian, and in the same year the Museum issued a Hand- 

 book (no. 19) on the Classification of the New York Series of 

 Geologic Formations, followed in the next year by one (no. 17) 

 on Economic Geology, and an important short paper on the "Eco- 

 nomic Products of St Lawrence County " in the 22d Report of the 

 Geologist, pages rii8 to ri24, by Prof. W. N. Logan, then of 

 St Lawrence University. The activity of this first five years of the 

 new century culminated in the appearance of Cushing's great bul- 

 letin (95 of the State Museum) on the " Geology of the Northern 

 Adirondack Region" indispensable companion of all subsequent 

 workers. The pages that bear particularly on the problems of 

 our own quadrangle are 276-89, 354-64, 386-94, 403, 406 and 

 418. Since this is available at a nominal price to all, it is useless 

 here to do more than acknowledge again our great indebtedness 

 to it. 



igo6. Fire tests of the Potsdam sandstone were reported by 

 W. E. McCourt in Museum Bulletin 100 (1906) and D. H. New- 

 land summarized Smyth's theory of the origin of the red iron ores 

 in Bulletin 112, page 38 (1907). The name Theresa for the 

 " passage beds " was proposed by Gushing in the Geological Society 

 of America Bulletin 19, page 160 (1908) and coincidently in the 

 Director's Report (Bulletin 121), page 12, together in the former 

 journal with a resume of the Paleozoic stratigraphy and geography 

 of our region, a subject which was also assailed by Dr A. W. 

 Grabau of Columbia University (Science, new series, 29: 351-56, 

 358; Journal of Geology 17: 211-26; 1909) who readvanced the 

 theory of Emmons and Ells. In 1909 also, H. Leighton published 

 in the Director's Report (Bulletin 133, p. 115-55) a list of geologic 

 maps of the State and a color reproduction of Amos Eaton's New 

 York State map of 1830, the first geologic map of the State. This 

 five-year period culminates with the reentry of Doctor Ulrich in 

 the field of New York stratigraphy (Museum Bulletin 140, pages 

 II, 127 to 140, in which the name Tribes Hill limestone is pro- 

 posed), and the publication of the " Geology of the Thousand Islands 

 Region" (Bulletin 145; 1910) by Gushing and others (see pages 

 14-24, 53-68, 78 footnote 2, 92-97, 1 12-18, 120-26). A note by 

 I)r P. E. Raymond in the American Journal of Science for the same 

 year (30:344) suggests the Ozarkian rather than Canadian age of 

 the Tribes Hill. 



ipii. The last five-year period opens with Ulrich's " Revision 

 of the Paleozoic Systems " (Geological Society of America Bul- 

 letin 22: 281-680, 191 1 ) and the geologic map of North America 



