56 



SCmNGE. 



[N. S. Vol. Itl. No. 54. 



York, nortli of the Devonian plateau. The 

 geographical location and extent of the 

 kames were shown by a large map and the 

 first three were named, the Irondequoit, 

 the Mendon and the Victor ; the last was 

 called the Junius. Excellent photographs 

 were passed around in further illustration. 



Paleozoic Terranes in the Connecticut Valley. 



C. H. Hitchcock, Hanover, N. H. 



The author has made occasional studies 

 of the rocks along the upper Connecticut 

 valley since his official connection with 

 state surveys, and thinks there are good 

 reasons for revising some of the conclusions 

 of the New Hampshire report. Some of 

 the points are : 1. The existence of two 

 hands of argillite ; one below and the other 

 above the calciferous mica schist. 2. The 

 hornblende schist of the neighborhood of 

 Hanover is a laccolite. 3. The protogene 

 gniesses of Hanover and of North Lisbon 

 are igneous. 4. With the views now enter- 

 tained of the igneous origin of the proto- 

 gene, hornblende schist, foliated diorites 

 and diabases, a new arrangement of the 

 stratified fossiliferous rocks of Littleton, N. 

 H., is suggested. The points were illus- 

 trated by geological maps. The older argil- 

 lite cited under 1 , above, was referred to 

 the Upper Silurian, and the later one to a 

 subsequent but not definitely determined 

 period. The discovery of contact effects 

 along the junction of the hornblende schist 

 of 2, with the argillites and mica schists is 

 additional ground for the later conclusion. 

 In support of 3, it was shown that the 

 gneiss contains inclusions of the schists. 

 Under 4 the metamorphic rocks, in associ- 

 ation with fossiliferous Niagara limestone at 

 Littleton, are now regarded as post-Niagara, 

 not Cambrian. B. K. Emerson, in dis- 

 cussion, remarked that this revision placed 

 the geological structure in harmony with 

 the results now attained in Massachusetts 

 on the south. 



The next paper was by C. Willard Hayes 

 on 'The Devonian Formations of the South- 

 ern Appalachians.' Mr. Hayes gave a gen- 

 eralized section of the Devonian as follows : 

 An upper and very persistent layer, 8 inches 

 to 24 inches thick, of a green sandstone, with 

 phosphatic nodules and shreds of volcanic 

 glass, feldspars, etc., such as to indicate a 

 volcanic tuff. Below this comes black shale, 

 0-12 ft., and not always present. The bot- 

 tom stratum is a ferruginous conglomerate 

 or sandstone 0-6 ft., and contains the re- 

 cently discovered phosphate beds of Ten- 

 nessee. Attempts to explain the thin char- 

 acter or actual absence of the Devonian 

 over great areas have been made as follows. 



1. The region was a deep sea bottom, 

 lacking sediments. 



2. It was a region of shallow waters 

 whose entering streams were without sedi- 

 ments. 



3. It was a land area. 



4. It was a shallow sea without sedi- 

 ments and with swift but clear currents, like 

 the Gulf stream region of the West Indies. 



The speaker believed, however, that such 

 sediment as was distributed came in large 

 part in currents from the northeast, and 

 that another current came from the south- 

 east and moved northwest, rounding the 

 Cincinnati arch. D. W. Langdon raised 

 the point of the relations of the Devonian 

 to the Helderberg limestones in southwest 

 Virginia, and the same point was discussed 

 by the author and by J. J. Stevenson. 

 Messrs. Keith, Van Hise and H. S. Wil- 

 liams also took part in the discussion. 



Notes on the Relations of the Lower Members of 



the Coastal Plain Series in South Carolina. 



N. H. Daeton, Washington, D. C. 



The formations below the Eocene buhr- 



stone which were included in the Eocene 



by Tuomey have been found to be Potomac. 



Some of their features and their relations to 



the marine Cretaceous were described. 



