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来源：百度知道 编辑：UC知道 时间：2024/06/07 11:38:14
The coalfields of southwest Virginia lie in the Appala- chian Plateau physiographic province. The area is charac- terized by a deeply dissected, mature topography of V- shaped valleys with steep slopes and narrow ridges. The landforms were shaped by the erosion of a high plateau of sedimentary origin. These sedimentary rocks, which range from Cambrian through Pennsylvanian in age, were uplifted as a block, with minimal deformation compared to the Valley and Ridge physiographic province. Accord- ingly, geologic strata remain nearly level to gently slop- ing, except near the edge of the eastern thrust block that marks the beginning of the Valley and Ridge province. In northern Dickenson County near the Buchanan Coun- ty border, the Russell Fork fault bisects the Virginia coal- fields (Fig. 1).

该煤田西南弗吉尼亚在于，在阿巴拉-洪健高原地形省。该地区的特点， terized由一个深刻的解剖，成熟的地形， V型山谷，与陡峭的山坡和狭窄的山脊。地貌被塑造的侵蚀一个高原的沉积成因。这些沉积岩，从寒武系通过pennsylvanian在年龄，被抬升1座，最小的变形相比，山谷和岭地形省。协议- ingly ，地层保持近水平轻轻边坡英，除了附近的边缘，东部推力块标志着山谷和岭省。在北部狄金森县附近的布坎南个国家的边界性，罗素叉故障bisects维吉尼亚州煤场（图1 ）

弗吉尼亚西南方的煤田躺在阿巴拉契亚高原地文学的省。 地区以一门被深深地详细研究，地形学里V形山谷的成熟以陡坡和狭窄的脊为特点。 地形因为一块沉淀的起源的高的高原的腐蚀被形成。 这些沉淀的岩石，从寒武纪至在年龄方面的宾西法尼亚， 有最小的变形与山谷和里奇地文学的省相比作为一街区举起。 因此， 地理层保持差不多水平温柔使溢出，除了在附近边缘的标明开始的那些山谷和里奇省的这东推街区。 在布坎南县边境附近在北迪肯森县，拉塞尔叉子错误对分弗吉尼亚煤田。