作业帮英语翻译Both the Virginia coalfield region and the northern West
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英语翻译
Both the Virginia coalfield region and the northern West Virginia area studied by Rauch (1989) are located within the Appalachian Plateau physiographic province.There are geologic differences between the two areas,however.One difference is that the majority of the southwestern Virginia coalfield is a part of the Pine Mountain thrust sheet,while the northern West Virginia coalfield is rela- tively undisturbed.Fracture zones (faults and lineaments) are more prevalent in southwestern Virginia,as a direct result of this geological movement.A second difference between the two areas is lithology.The southwestern Vir- ginia coalfield is dominated by sandstone,while argilla- ceous rock types are more prevalent in northern West Virginia.Shales tend to form perched aquifers and are more likely to swell and seal rock fractures than are the sandstone units of southwestern Virginia.Limestones,virtually absent in southwestern Virginia’s coal mining area,are more common in northern West Virginia,sometimes in association with coal seams.
Both the Virginia coalfield region and the northern West Virginia area studied by Rauch (1989) are located within the Appalachian Plateau physiographic province.There are geologic differences between the two areas,however.One difference is that the majority of the southwestern Virginia coalfield is a part of the Pine Mountain thrust sheet,while the northern West Virginia coalfield is rela- tively undisturbed.Fracture zones (faults and lineaments) are more prevalent in southwestern Virginia,as a direct result of this geological movement.A second difference between the two areas is lithology.The southwestern Vir- ginia coalfield is dominated by sandstone,while argilla- ceous rock types are more prevalent in northern West Virginia.Shales tend to form perched aquifers and are more likely to swell and seal rock fractures than are the sandstone units of southwestern Virginia.Limestones,virtually absent in southwestern Virginia’s coal mining area,are more common in northern West Virginia,sometimes in association with coal seams.
无论是被Rauch（ 1989年）研究的弗吉尼亚州煤田地区和西弗吉尼亚州北部地区都是位于阿巴拉契亚高原地形省.然而,两地间有地质上的区别.一个不同的是,大部分的西南弗吉尼亚州煤田是佩恩山区的一部分逆冲岩席,而北部的西弗吉尼亚州煤田是较为平坦.作为这种地质活动的直接结果,弗吉尼亚州西南部,断裂带的出现更为普遍.第二,两者的岩石性质不同.西南弗吉尼亚州煤田主要是砂岩,而在弗吉尼亚州北部岩石类型主要是高岭土.页岩比西南弗吉尼亚州的砂岩更趋向于形成含水层和更容易膨胀和密封的岩石裂隙.在弗吉尼亚州西南部的矿区,石灰岩几乎不存在,而在西弗吉尼亚州北部较常见,有时与在一起煤层.
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