A set of en‐echelon reverse faults cut Paleozoic metamorphosed igneous rocks of the Piedmont and overlying late Cenozoic sediments at the Old Hickory Heavy Mineral Deposit in the Fall Zone of southeastern Virginia. Diorite of the eastern Slate Belt was faulted over nearshore to shore‐face deposits of the Pliocene Yorktown Formation. These NW‐SE‐striking faults experienced oblique dip‐slip movement with a maximum displacement of up to 6 m on individual faults. Faults tip out along strike and are overlain by distinct cobble beds, suggesting that sediment deposition and faulting were contemporaneous. Deformation at Old Hickory may have been formed by reactivation of existing Paleozoic structures under a regionally extensive compressional stress field parallel to the modern one.

中文翻译：

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弗吉尼亚东南部秋季带晚新生代逆断层

一组梯级反向断层切割了弗吉尼亚州东南部秋季带的老山核桃重矿床的山麓古生代变质火成岩和上覆晚新生代沉积物。东部板岩带的闪长岩在上新世 Yorktown 组的近岸到岸面沉积物上断层。这些 NW-SE 走向的断层经历了斜倾滑移运动，单个断层上的最大位移可达 6 m。断层沿走向倾斜并被不同的鹅卵石床覆盖，这表明沉积物沉积和断层作用是同时发生的。Old Hickory 的变形可能是由现有古生界构造在与现代平行的区域性广泛压缩应力场下重新激活而形成的。