[40] Amer. Jour. of Sci., vol. x, 3d ser., 1875, p. 506.

[41] McGee. Amer. Jour. Sci., 3d ser., vol. xxxv, p. 376.

[42] Davis and Wood, Geographic Development of Northern New Jersey, pp. 413, 414.

[43] “Rivers and Valleys of Pennsylvania,” Davis, W. M., published in The National Geographic Magazine, in 1889.

[44] Davis, W. M., “Geographic Development of Northern New Jersey,” p. 397–8.

[45] Davis, W. M., Amer. Jour. of Sci., 3d ser. vol. xxxvii., 1889, p. 432.

[46] Geog. Devel. of Northern New Jersey, p. 404 et seq. Proc. Bos. Soc. Nat. Hist. Also Rivers of Northern New Jersey, p. 11 et seq. National Geographic Magazine, vol. ii, p. 93.

[47] Faults in the Triassic Formation near Meriden, Conn. Bulletin of the Mus. Comp. Zoöl. Harvard Univ. vol. xvi. No. 4, p. 82.

[48] J. D. Dana, Amer. Jour. Sci. 3d. ser., vol. xv, p. 506.

[49] J. D. Dana, Amer. Jour. of Sci. 3d ser. vol. xxv, p 446.