8 



BULLETIN 1189, U. S. DEPARTMENT OF AGRICULTURE. 



Walden Ridge and the Cumberland Mountain, as shown on the Geological 

 Map of Tennessee. 



Virginia Valley and Ridge region. — On the north, the Potomac River: on 

 the east the boundary follows the line between the Cambrian formations and 

 the Cambro-Ordovician formations at the break between the Blue Ridge and 

 the Shenandoah Valley, as shown on the Geological Map of Virginia, and fol- 

 lowing the Shenandoah River in West Virginia to the Potomac River; on the 

 south, Tennessee-Virginia boundary line; on the west the boundary line con- 

 tinues from the Cumberland Mountains, northward along Stone Mountain, 

 Powell Mountain. Stone Ridge, Back Allegheny Mountain, Cheat Mountain, and 

 Allegheny Front, as shown on topographic sheets and West Virginia Geological 

 Maps. 



Cumberland Plateau ret/ion. — On the north, the Cumberland River; on the 

 east, the East Tennessee Valley region ; on the south, the Tennessee- Alabama 

 boundary line; on the west, the western boundary of the coal area, as shown 

 on the Geological Map of Tennessee. 



EAST TENNESSEE VALLEY PEG/OH 

 Y/PG/WA YALLEY AND P/DGE REG/ON. 

 CUMBERLAND PI ATE At/ PEG/ON 

 H^H ALLEGHENY- PLATEAU PEG/ON 

 I~" //VTEP/OP LOW PLATEAU PEG/ON 

 \ GULP COASTAL PLA/NS PEG/ON 



Fig. 2. — Outline map of Tennessee, Kentucky, and West Virginia, showing the pomologi- 



cal regions. 



Allegheny Plateau region. — On the north, the Pennsylvania- West Virginia 

 boundary line ; on the east, the Virginia Valley and Ridge region ; on the south, 

 the Cumberland Plateau region ; on the west, the Ohio River to the town of 

 Vanceburg, Ky., where the boundary line follows the Carboniferous-Devonian 

 contact to the Kentucky River. From that point it follows the western edge of 

 the coal measures as shown on the Kentucky Geological Map. 



Interior Lore Plateau region. — On the north, the Ohio River; on the east, the 

 Cumberland and Allegheny Plateau regions ; on the south, the Tennessee-Ala- 

 bama boundary line ; on the west, the Tennessee River. 



Gulf Coastal Plain* region. — On the north, the Ohio River; on the east, the 

 Tennessee River; on the south, the Tennessee-Mississippi boundary line; on the 

 west, the Mississippi River. 



In order that the limits of the regions lying within the area covered 

 by this bulletin may be more clearly defined and the character of 

 each region better understood, brief descriptions of the more im- 

 portant physical and pomological features are given. 



The three pomological regions lying nearest the Atlantic coast — 

 the Atlantic Coastal Plain, Piedmont, and Blue Ridge regions — are 

 outside the area under consideration. The Atlantic Coastal Plain 

 region has been outlined and described in Bureau of Plant Industrv 

 Bulletins 135 (18) and 194 (19). The Piedmont and Blue Ridge 

 regions are described in Bureau of Plant Industry Bulletin 135. 



