No. 8.] BIBLIOGRAPHY OF CONNECTICUT GEOLOGY. 49 



provinces in North America (with explanatory texts and 

 geological sections). 92 pp., 8 pis., Boston, 1853. 



Facts regarding the Paleozoic and Secondary rocks of Connecticut 

 are based on the work of Hitchcock and Percival. The sandstone is 

 considered the equivalent of the Keuper of the European Trias; the 

 trap is like that in Auvergne and in Ireland. Fossils of ganoid fish, 

 and foot-prints of birds are found. The Green Mountain system, the 

 " meridional system," extends through Litchfield and Fairfield counties, 

 and terminates near Bridgeport; the Allegheny system is found east of 

 New Haven. The sandstone and traps are of the same age as the 

 copper-bearing rocks of Lake Superior. The geological divisions used 

 are those of M. de Verneuil, including Murchison's grouping of the 

 Paleozoic. 



199. Marcou, J. 



Resume explicatif d'lme carte geologique des Etats-Unis 

 et des provinces anglaises de I'Amerique du Nord, avec un 

 profil geologique allant de la vallee du Mississippi aux 

 cotes du Pacifique, et une planche de fossiles. • 



Soc. geol. France, Bull., (2) xii, 813-936, map, pi., 1854- 

 55. Abstract: Petermann, IMittheil, i, 149-159, map, 1855. 

 Reviewed and errors enumerated: Am. Jour. Sci., (2) 

 xvii, 198-206, 1854. 



Between Carboniferous and Jurassic is a series of red sandstones 

 and shales containing few fossils; age of these deposits not Old Red 

 sandstone as stated by some geologists, nor Oolite nor Lias as contended 

 by James Hall. The New Red sandstone of United States divided into 

 four series, of which Connecticut rocks are the highest. 49 species of 

 fossil foot-prints have been described, also three ganoids. Cupriferous 

 trap rock, contemporaneous with the sandstones, broke through fissures, 

 lifted and metamorphosed the sandstones, and spread out in places 

 like lava flows. 



200. Marcou, J. 



Geology of North America, with two reports on the 

 prairies of Arkansas and Texas, the Rocky, mountains of 

 New Mexico, and the Sierra Nevada of California. 144 

 pp., 7 pis., 3 maps, 4°, Zurich, 1858. 



Connecticut valley contains New Red sandstone; crystalline and 

 metamorphic rocks underlie the remainder of the state. Litchfield and 

 Fairfield are parts of the Green mountain system. " Alleghenian dislo- 

 cations continue into Connecticut to the eastward of New Haven." The 

 report contains chapters on classification of mountains, progress and 

 discoveries of geology of North America, and bibliography of maps and 

 memoirs. 



(This report is not considered trustworthy, and was severely criti- 

 cised at the time of its appearance by Hall, Whitney, Blake, Dana, and 

 others. — Ed.) 



201. Markham^ F. G. 



Volcanic and seismic disturbances in southern Connecti- 

 cut. 



Connecticut Mag., ix, 68-74, 5 figs., 1905. 



