Description of the Raritan Quadrangle
DESCRIPTION OF THE RARITAN QUADRANGLE. By W. S. Bayley, H. B. Kiimmel, and B. D. Salisbury.« INTRODUCTION. of the province lose much of their definite character, but the Piedmont Plateau and the Appalachian Mountain belt are not Appalachian Valley is continued in the Champlain Valley of separated by a sharp geologic boundary, and in many places GENERAL RELATIONS. western Vermont. geologic formations extend continuously from the mountain Position and area. The Raritan quadrangle lies between In New Jersey the eastern part of the belt is occupied by the belt into the great valley. In the general region including parallels 40° 30' and 41° and meridians 74° 30' and 75° and broad Kittatinny Valley and the western part by the narrow northern New Jersey, southeastern New York, and eastern comprises four smaller (15') quadrangles the Hackettstown, Delaware Valley, the two being separated by the bold even- Pennsylvania, however, the conditions are somewhat different. Lake Hopatcong, High Bridge, and Somerville covering an crested ridge of Kittatinny Mountain, which, although one of Each of the physiographic subdivisions is strikingly different area of 905.27 square miles. It is in northern New Jersey the minor ridges in the Appalachian Valley belt, reaches a from the others in geologic character, although even here (see fig. 1) and includes parts of Hunterdon, Middlesex, Morris, greater altitude than the Highlands east of the valley. absolute lines can not be drawn, as some formations are com Somerset, Sussex, and Warren counties and contains the cities The Appalachian Valley is bounded on the east by the mon to all three.
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