This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1870 edition. Excerpt: ... From the Author. prom The Transactions Op The Conn. Acad. Op."abts And Sciences, Tol. ii On The Geology Of The New Haven Region, '-With Special Reference To The Origin Of Some Of Its Topgpaphical Features. By James D. Dana. ""'." "" With A Map. ' _.," 1. The New Haven Region. .," ' Either side of New Haven bay, --an indentation of the coast.aibbiit four miles in depth, --there is a north-and-south range of hills', th'e trap and sandstone ridges of East Haven and North Haven on the eft's,"' and the eastern portion of the Woodbridge plateau on the west; and-."'these make the eastern and western boundaries of the New Haven region. Their height, which is greatest to the north, probably nowhere exceeds 600 feet. The width of the region varies from about four miles on the south to seven on the north, and the whole length from the Sound to Mt. Carmel--its true northern topographical limit--is twelve miles. The northern half of the region is divided longitudinally by two lines of ridges: (1) the long West Rock trap ridge near the western side, four hundred feet and upward in height; and (2), nearly midway in the area east of West Rock, the short isolated East Rock (E) range of trap and sandstone, and the continuation of this range northward to Mt. Carmel in the low Quinnipiac sandstone ridge which divides the waters of Mill River and the Quinnipiae. The New Haven region hence consists in its northern half of three subordinate north-and-south regions; (1) a narrow valley west of West Rock, drained by West River; (2) a broad central plain (the Hamden plain), continuous with the New Haven plain, rising into hills to the northward, and drained along the east side by Mill river; and (3) a wide eastern portion occupied by the river-course and...