Bulletin . plerailroad outlet. The wagon roads for the most part are fair, and some ofthem are good. Topography.—The Virgilina district lies wholly within the PiedmontPlateau, and presents the topographic features common to that physio-graphic province. The topography is mature, the hills are all well rounded,and relief is much subdued. In fact, there is little relief noticeable to thecasual observer, except where streams have cut through the Virgilina ridge. 2 GEOLOGY AND OEE DEPOSITS OF THE VIKGILINA DISTEICT. a low-lying, nearly flat-topped ridge with very gentle slopes, which formsthe most
Bulletin . plerailroad outlet. The wagon roads for the most part are fair, and some ofthem are good. Topography.—The Virgilina district lies wholly within the PiedmontPlateau, and presents the topographic features common to that physio-graphic province. The topography is mature, the hills are all well rounded,and relief is much subdued. In fact, there is little relief noticeable to thecasual observer, except where streams have cut through the Virgilina ridge. 2 GEOLOGY AND OEE DEPOSITS OF THE VIKGILINA DISTEICT. a low-lying, nearly flat-topped ridge with very gentle slopes, which formsthe most prominent surface feature of the district. The most marked reliefis along Dan Eiver, which crosses the district near its center. This streamcrosses the rocks approximately at right angles to the strike of theschistosity, and, where it cuts through the Virgilina ridge, the slopes aresteep and the topography is rather rugged. The remainder of the districtis without prominent relief, but is decidedly Scale 50 75 lOO Miles Fig. 1.—Map of a portion of North Carolina and Virginia, showing the location ofthe Virgilina district. (Taken from a map of the United States by the General Land Office, 1915.) DRAINAGE, SOIL, CLIMATE. 3 Drainage.—The principal stream is Dan Eiver, which flows in a sonth-east direction across the center of the district. Within the area the Dan isjoined from the north by Bannister and Eoanoke rivers, and from the southby Hyco River and Aarons Creek. The Eoanoke receives Horsepen Creekfrom the east, and Difficult Creek from the west, while Hyco receives BlueWing and Mayo creeks from the east. These make up the principal streams,but rainfall during certain portions of the year is very heavy and smallerstreams are numerous. The larger streams, especially Dan and Eoanokerivers, hold their course regardless of the character of the underlying rocks,but the creeks and smaller streams are greatly influenced, if not controlled,by it. Eainfall, especially du
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