Description of the Hollidaysburg and Huntingdon Quadrangles
DESCRIPTION OF THE HOLLIDAYSBURG AND HUNTINGDON QUADRANGLES By Charles Butts INTRODUCTION 1 BLUE RIDGE PROVINCE topography are therefore prominent ridges separated by deep SITUATION The Blue Ridge province, narrow at its north end in valleys, all trending northeastward. The Hollidaysburg and Huntingdon quadrangles are adjoin Virginia and Pennsylvania, is over 60 miles wide in North RELIEF ing areas in the south-central part of Pennsylvania, in Blair, Carolina. It is a rugged region of hills and ridges and deep, The lowest point in the quadrangles is at Huntingdon, Bedford, and Huntingdon Counties. (See fig. 1.) Taken as narrow valleys. The altitude of the higher summits in Vir where the altitude of the river bed is about 610 feet above sea ginia is 3,000 to 5,700 feet, and in western North Carolina 79 level, and the highest point is the southern extremity of Brush Mount Mitchell, 6,711 feet high, is the highest point east of Mountain, north of Hollidaysburg, which is 2,520 feet above the Mississippi River. Throughout its extent this province sea level. The extreme relief is thus 1,910 feet. The Alle stands up conspicuously above the bordering provinces, from gheny Front and Dunning, Short, Loop, Lock, Tussey, Ter each of which it is separated by a steep, broken, rugged front race, and Broadtop Mountains rise boldly 800 to 1,500 feet from 1,000 to 3,000 feet high. In Pennsylvania, however, above the valley bottoms in a distance of 1 to 2 miles and are South Mountain, the northeast end of the Blue Ridge, is less the dominating features of the landscape.
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