File:The geology of New Hampshire - a report comprising the results of explorations ordered by the legislature (1874) (14597897747).jpg

Identifier: geologyofnewhamp35newh (find matches)
Title: The geology of New Hampshire : a report comprising the results of explorations ordered by the legislature
Year: 1874 (1870s)
Authors: New Hampshire. Geological and Mineralogical Survey Hitchcock, Charles H. (Charles Henry), 1836-1919 Upham, Warren, 1850-1934 Huntington, Joshua Henry, 1833-1904 Quimby, Elihu T. (Elihu Thayer), 1826-1890 Scudder, Samuel Hubbard, 1837-1911 Flint, William F Edwards, Arthur M. (Arthur Mead) Hawes, George Wesson, 1848-1882
Subjects: Geology Rivers Insects Botany Fragilariaceae Drift Mineralogy Physical geography
Publisher: Concord : E. A. Jenks, state printer
Contributing Library: University of New Hampshire Library
Digitizing Sponsor: University of New Hampshire Library

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a nearly level depression, 300 to 400 feet wide, 25 feet be-low the alluvial plain on the west, and 60 feet below the gravel ridge orkame on the east. Its height is 154 feet above the river on the north, or487 feet above the sea. It descends only three feet in going 1,000 feetto the south, where the high plain in which it was formed, and the ridgewhich was its eastern barrier, have both been washed away. Through Hartford and Hartland the upper terrace is well exhibited, ofa normal height 525 to 500 feet above the sea, or nearly 200 feet above Hartland d o Delta Lulls o d o depot. Kame. d ^ d d sea. Ficr. 10.—Section in Hartland and Plainfield. Length, i^ miles. the river, and reaching one third to one mile back from it; but in severalplaces this is broken by hills of ledge or till, isolated or extending acrossit nearly to the river. Its normal height is increased 40 to 80 feet by vuie in. ^ SHOWING theModifiedDriftofCONNECTICUT RIVER. SCALE or MILES y Nos.9-13. BoaadairMmeali/races,
Text Appearing After Image:
MODIFIED DRIFT ALONG CONNECTICUT RIVER. 41 tributary alluvium for two miles south from Ouechee river, and for onemile south from Lulls brook. A level-topped delta, on both sides of thelatter at its opening into the main valley just south of Hartland village,is 320 feet above the river, which is less than a mile distant. This highdelta is terminated by a steep slope of from 25 to 40 feet, below which, atthe south, there is no line of separation between the additions from thisbrook and the ordinary highest terrace; but the whole shows an irregularsurface of smoothly rounded hills and hollows, formed by small streams.Similar erosion has taken place west of North Hartland. This cause hasfrequently destroyed the true shape of these high plains, originally level,and bounded by a steep escarpment; instead of which we now find slop-ing buttresses, ravines, and scattered knolls and ridges, in a confusionquite opposite to the beautiful system and regular form of the terraces. In Lebanon and Cor

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