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首页> 外文会议>Highway Geology Symposium; 20050504-06; Wilmington,NC(US) >THE CRETACEOUS PEEDEE FORMATION AND EOCENE CASTLE HAYNE LIMESTONE IN SOUTHEASTERN, NC AND THEIR OCCURRENCE IN THE MARTIN MARIETTA ROCKY POINT QUARRY, PENDER COUNTY
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THE CRETACEOUS PEEDEE FORMATION AND EOCENE CASTLE HAYNE LIMESTONE IN SOUTHEASTERN, NC AND THEIR OCCURRENCE IN THE MARTIN MARIETTA ROCKY POINT QUARRY, PENDER COUNTY

机译：北卡罗来纳州东南部的白垩纪地层形成和始新世海恩·利蒙斯通及其在彭德县马丁·马里塔塔岩点采石场的发生

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摘要

The Martin Marietta Quarry at Rocky Point is located in the southeastern coastal plain of North Carolina, or in the southeastern part of the Atlantic Coastal Plain Province. The coastal plain province is a seaward-dipping and -thickening wedge of relatively unconsolidated siliciclastic and carbonate sediments that is underlain by rocks of the Appalachian orogen (Horton et al., 1991). In North Carolina, the coastal plain is separated into two tectonic blocks that have behaved differently through time, the northern Albemarle block and the southern Onslow block. The division between the two blocks is the Neuse hinge, a northwest-southeast trending feature extending from the fall line to the coast between New River Inlet and Cape Lookout (Fig. 1). Mesozoic and Cenozoic sediments thicken and thin across the blocks with the thickest section occurring in the Albemarle embayment on the Albemarle block at Cape Hatteras. The section thins to the southwest onto the axis of the Cape Fear arch, a northwest-southeast trending high located just north of the South Carolina state line. Mesozoic and Cenozoic sediments that generally trend northeast to southwest on the Albemarle block assume more of a north to south strike on the Onslow block wrapping around the nose of the Cape Fear arch. Cretaceous sediments are exposed along the axis of the arch and to the north Paleogene (Eocene, Oligocene) sediments are exposed. A discontinuous thin veneer of Plio-Pleistocene and Quaternary sediments overlies the Paleogene.
机译：落基点的马丁·玛丽埃塔采石场位于北卡罗来纳州的东南沿海平原，或大西洋沿海平原省的东南部。沿海平原省是一个相对较松散的硅质碎屑和碳酸盐沉积物的向海浸润和增厚的楔形物，其底部为阿巴拉契亚造山带的岩石（Horton等，1991）。在北卡罗来纳州，沿海平原被划分为两个构造块，北部的阿尔伯马尔块和南部的昂斯洛块在时间上表现不同。这两个区块之间的分界是Neuse铰链，这是一个西北偏东南的趋势特征，从下降线延伸到New River Inlet和Cape Lookout之间的海岸（图1）。中生代和新生代沉积物在整个块体上变厚和变薄，其中最厚的部分出现在哈特拉斯角的阿尔伯马尔街区的阿尔伯马尔河道内。该剖面向西南变薄，延伸到Cape Fear拱的轴线上，Cape Fear拱是位于南卡罗来纳州立州线以北的西北偏东南趋势高点。通常在阿尔伯马尔街区向东北向西南方向发展的中生代和新生代沉积物，在围绕Cape Fear拱门鼻子的昂斯洛区块上，承担了更多的北向南走向。白垩纪沉积物沿拱形轴暴露，北古近纪（始新世，渐新世）沉积物暴露。上新世和上新世和第四纪沉积物的不连续薄单板。

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