A hand book of Virginia . 2) a central orplateau region, designated the Piedmont Plateau; and (3) a west-ern or mountain region, designated the Appalachian Mountainsprovince. These three provinces of the State differ markedly in thenature and origin of surface features, and in the age and kinds ofrocks. They are intimately related to the geologic structure andhence have an important bearing upon the mineral resources ofthe State. As shown from an examination of a geologic map, the Statestretches from the Atlantic coast westward nearly entirely acrossthe Appalachian Mountain system. Within this
A hand book of Virginia . 2) a central orplateau region, designated the Piedmont Plateau; and (3) a west-ern or mountain region, designated the Appalachian Mountainsprovince. These three provinces of the State differ markedly in thenature and origin of surface features, and in the age and kinds ofrocks. They are intimately related to the geologic structure andhence have an important bearing upon the mineral resources ofthe State. As shown from an examination of a geologic map, the Statestretches from the Atlantic coast westward nearly entirely acrossthe Appalachian Mountain system. Within this area are foundrocks that represent all the principal divisions of geologic as great a variety of rock types, of structure which char-acterizes both profoundly disturbed and undisturbed rock masses,and of topography, is shown. Virginia therefore is possessed ofan abundance and variety of mineral materials, many of whichhave been worked since early colonial days, especially the coal,iron ores, and brick 4? About forty mineral materials are now exploited, many of themon a large scale, which afford a basis of important commercialenterprises, and give to the State prominence in a varied and ex-tensive mining industry, which amounts annually to more than$20,000,000. The mineral products that have been mined andquarried in Virginia are: Iron ores, manganese ores, gold and sil-ver, copper, lead and zinc, tin, coal, clay, sand and gravel, stone(granite, marble, limestone, sandstone, and slate), abrasive mate-rials (millstones and emery), silica (quartz, chert, and diatoma-ceous earth), mica, feldspar, asbestos, talc and soapstone, barytes,gypsum, salt, mineral paint (ochre), marl (greensand and cal-careous), pyrite and pyrrhotite, arsenic, phosphate, graphite,rutile (titanium), monazite, mineral waters, and precious stonesin considerable variety. Without exception the mineral products now produced in Vir-ginia can be developed still further with an increased produc
Size: 1287px × 1942px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidhandbookofvi, bookyear1911
