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



143. Hitchcock, E. 



On the trap tufif, or volcanic grit of the Connecticut 

 valley, with the bearings of its history upon the age of 

 the trap rock and sandstone generally in that valley. 



Am. Jour. Sci., (2) iv, 199-207, 2 figs., 1847. Abstract: 

 Am. Jour. Sci., (i) xlvii, 103, 104, 1844. 



Tuff near Mount Tom described in detail. Order of events: De- 

 position of sandstone; bedded traps produced at intervals; " principal 

 trap ranges emerged with considerable disturbance bf sandstone." 

 General dip of sandstone due to lateral pressure. 



144. Hitchcock, E. 



An attempt to discriminate and describe the animals 

 that made the fossil foot-prints of the United States, and 

 especially of New England. 



Am. Acad. Arts Sci., Mem., iii, 129-256, 24 pis., 1848. 



Forty-seven species of animals described from their foot-prints 

 have been found in the Connecticut valley, in Massachusetts and Con- 

 necticut, classified as follows: 12 quadrupeds; 2 annelids or molluscs; 

 3 of doubtful origin; 32 bipeds, mostly birds. The Connecticut localities 

 where the remains were found are Suffield, Rocky Hill, Wethersfield 

 cove, 2 miles south of the cove, Portland, 2 miles west of Middletown. 



145. Hitchcock, E. 



Illustrations of surface geology. 



Smithson. Contr. Knowl., ix, art. iii, 155, 12 pis., 1857. 



Detailed description of the terraces and beaches, particularly of 

 the Connecticut valley; they were formed during a period of sub- 

 mergence of the continent when the ocean stood relatively 2,000 feet 

 higher than its present level; drift (unmodified deposits) produced par- 

 tially^ by glaciers, mostly by icebergs, possibly by mountain slides and 

 earthquake waves. 



146. Hitchcock, E. 



Ichnology of New England; a report on the sandstones 

 of the Connecticut valley, especially its fossil foot-marks, 

 xii, 220 pp., 50 pis., including hand-colored map. Boston, 

 1858, published by the Commonwealth of Massachusetts. 



Abstract and review: Am. Jour. Sci., (2) xxvii, 270-272, 



1859. 



First foot-prints found in South Hadley, 1802, spoken of as tracks 

 of " Noah's Raven "; in 1836 tracks observed on flagging stone from 

 Montague, and sent to Hitchcock by Deane as " foot-prints of birds." 

 Connecticut valley sandstones above and below the traps are of differ- 

 ent ages, the upper being Jurassic, the lower may be Triassic and Per- 

 mian. Trap was deposited on sandstone. Connecticut localities from 

 which foot-prints were obtained are Suffield, Rocky Hill, Wethersfield, 

 Portland, Middletown, Middlefield, Durham. The question of the dis- 

 covery of foot-prints is discussed, and a bibliography of 63 titles is 

 given. 

 _,_ (See Deane, loi.) 



