Description of the Birmingham Quadrangle
DESCRIPTION OF THE BIRMINGHAM QUADRANGLE. By Charles Butts. INTRODUCTION. that flow across it toward the Atlantic. The Appalachian Tennessee, in Sequatchie Valley, and along Big Wills Creek Mountains occupy a broad belt extending from southwestern are parts of the same peneplain. Below the Coosa peneplain LOCATION, EXTENT, AND GENERAL RELATIONS. Virginia through western North Carolina and eastern Ten the streams of the southern part of the Appalachian province As shown by the key map (fig. 1), the Birmingham quad nessee to northeastern Georgia. This belt is a region of strong have eroded their present channels. rangle lies in the north-central part of Alabama. It is bounded relief, characterized by points and ridges 3000 to 6000 feet or Drainage. The northern part of the Appalachian province by parallels 33° 30' and 34° and meridians 86° 30' and 87° over in height, separated by narrow V-shaped valleys. The is drained through St. Lawrence, Hudson, Delaware, Susque- and contains, therefore, one-quarter of a square degree. Its general level of the Appalachian Valley is much lower than hanna, Potomac, and James rivers into the Atlantic and length from north to south is 34.46 miles, its width from east that of the Appalachian Mountains on the east and of the through Ohio River into the Gulf of Mexico; the southern Appalachian Plateau on the west. Its surface is character part is drained by New, Cumberland, Tennessee, Coosa, and 87 ized by a few main valleys, such as the Cumberland Valley in Black Warrior rivers into the Gulf. In the northern part £35 Pennsylvania, the Shenandoah Valley in Virginia, the East many of the rivers rise on the west side of the Great Appa Tennessee Valley in Tennessee, and -the Coosa Valley in lachian Valley and flow eastward or southeastward to the Alabama, and by many subordinate narrow longitudinal val Atlantic; in the southern part the direction of drainage is leys separated by long, narrow ridges rising in places 1000 to reversed, the rivers rising in the Blue Ridge and flowing west 1500 feet above the general valley level.
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