36 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Macfarlane's Am. Geol. R. R. Guide, 56-66, 1879; 2d 

 ed., rev. and enl., 1890. 



List of stations on Connecticut railroads given, with character and 

 age of rock to be seen at each place. An attempt is made to correlate the 

 rock groups of Percival with those of other localities, thus introducing 

 the terms Laurentian, Montalban, etc., into Connecticut geology. 



134. Hitchcock, C. H. 



North America in the ice period. 



Pop. Sci. Mon., XX, 229-242, 1882. 



There was an eastern American area of ice which included Con- 

 necticut, and whose center was in Labrador. Old channels of the 

 Hudson and Connecticut rivers indicate an oscillation of level. 



135. Hitchcock, C. H. 



Geological map of United States and part of Canada. 

 Am. Inst. Min. Eng., Trans., xv, 465-488, map, 1886. 



Discussion and description of the scheme of coloration and nomen- 

 clature, recommended by the International Geological Congress, for 

 representing the various geological formations on a map; review of 

 earlier maps of Maclure, Hall, Lyell, E. Hitchcock, Marcou, H. D. 

 Rogers, Hall and Lesley, Hall and Logan, C. H. Hitchcock and Blake, 

 C. H. Hitchcock and McGee. Brief mention of geological formations in 

 Connecticut. 



136. Hitchcock, E. 



A sketch of the geology, mineralogy, and scenery of 

 the regions contiguous to the river Connecticut; with a 

 geological map and drawings of organic remains; and oc- 

 casional botanical notices. 



Am. Jour. Sci., (i) vi., 1-86, 201-236, map, 1823; vii, 1-30, 

 map, 1824. 



In these articles are described the " East Haven granite " ; granitic 

 veins "contemporaneous with the formation of the rock"; porphyritic 

 granite; hornblende slate, mica slate, as in Bolton, Litchfield, etc.; 

 chlorite slate in Milford; Primitive greenstone in West Haven and 

 Wolcott; verd-antique in Milford; Old Red sandstone, including large 

 areas of "Coal formation" and containing fossil bones; Secondary 

 greenstone, its structure, composition and distribution. The " green- 

 stone " forms beds in the peculiar rocks of the Coal formation, and 

 both greenstones and Coal formation rest on Old Red sandstone; talus 

 proves recent creation of earth; greenstone probably of igneous 

 origin; coal occurs in Middletown, Chatham, Southington, Berlin, Som- 

 ers, Ellington, Enfield; is in very thin seams; fish remains obtained at 

 Westfield, and plants from Granby; alluvion; geest, the bowlders of 

 which were deposited by a current from the northeast. Eleven mines 

 are described, also 119 mineral and rock species. Lakes formerly 

 existed in the Connecticut valley. Table given showing relative age of 

 all rocks. 



137. Hitchcock, E. 



Miscellaneous notices of mineral localities, with geo- 

 logical remarks. 



Am. Jour. Sci., (i) xiv, 215-230, 1828. 



