globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.05.017
论文题名:
Micropaleontologic record of Pliocene and Quaternary paleoenvironments in the southern Albemarle Embayment, North Carolina, U.S.A
作者: Culver S.J.; Farrell K.M.; Mallinson D.J.; Willard D.A.; Horton B.P.; Riggs S.R.; Thieler E.R.; Wehmiller J.F.; Parham P.R.; Moore J.P.; Snyder S.W.; Hillier C.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 457
起始页码: 360
结束页码: 379
语种: 英语
英文关键词: Diatoms ; Foraminifera ; Holocene ; Paleoenvironments ; Pleistocene ; Pollen
英文摘要: The Albemarle Embayment, a Cenozoic depositional basin on the Atlantic coast of the USA, is an ideal setting to understand the temporal and spatial variation of eustatic sea-level fluctuations, glacio-hydro-isostasy, tectonics, subsidence, environments and sedimentation patterns of a passive margin Quaternary section. A NE–SW transect of cores and seismic data in the southern Albemarle Embayment were analyzed using micropaleontologic (foraminifera, diatoms, pollen), sedimentologic, stratigraphic, and geochronologic data to reconstruct the paleoenvironmental evolution and paleoclimates in the nearly 90 m thick Quaternary section. The study area is a very low gradient Quaternary landscape that is cross-cut by several Pleistocene incised valleys; a Holocene barrier island complex forms its eastern margin. In the subsurface, the Albemarle Embayment is bordered to the north by the Norfolk Arch and to the south by the depositionally-constructed Cape Lookout High, which is positioned on the northern flank of the structural Carolina Platform. The Quaternary section overlies mid-Pliocene carbonates in three cores; the contact rises in elevation towards the Cape Lookout High. Fossils and sediment characteristics suggest a subtropical, shallow, high energy marine environment during the Pliocene. Overlying units include incomplete Pleistocene, clastic, transgressive-regressive (T-R) deposits. These have similar ages and stratigraphic signatures as the T-R cycles in the central and north-central Albemarle Embayment, although mid-Pleistocene deposits may be older in the southern region. The bulk of the early and mid-Pleistocene record consists of inner to mid-shelf sand and muddy sand. In contrast, late Pleistocene sands are of inner shelf origin, reflecting the infilling of the basin. Lowstand paleovalleys, with fluvial, wetland and estuarine fill, dissect the early, mid- and late Pleistocene marine units; their locations reflect antecedent topography. Holocene sediments were deposited in shoreface and barrier island environments. Quaternary foraminiferal assemblages in the southern Albemarle Embayment exhibit greater species richness than those in the central and north-central embayment reflecting the presence of a major biogeographic boundary at the same location as the modern biogeographic boundary at Cape Hatteras. © 2016 Elsevier B.V.
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被引频次[WOS]:6   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68353
Appears in Collections:过去全球变化的重建

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作者单位: Department of Geological Sciences, East Carolina University, Graham Rm 101, Greenville, NC, United States; North Carolina Geological Survey, Coastal Plain Office and Core Repository, MSC 1620, Raleigh, NC, United States; U.S. Geological Survey, 926A National Center, Reston, VA, United States; Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ, United States; Institute of Earth, Ocean, & Atmospheric Sciences, Rutgers University, New Brunswick, NJ, United States; Division of Earth Sciences and Earth Observatory of Singapore, Nanyang Technological University, Singapore; U.S. Geological Survey, Coastal and Marine Geology Program, 384 Woods Hole Road, Woods Hole, MA, United States; Department of Geological Sciences, University of Delaware, Newark, DE, United States; Southeast Asia Disaster Prevention Research Initiative (SEADPRI), Universiti Kebangsaan Malaysia (National University of Malaysia), Malaysia; West Virginia Geological Survey, 1 Mont Chateau Road, Morgantown, WV, United States; Argus Ecology Ltd., Annfield Plain, Durham, United Kingdom

Recommended Citation:
Culver S.J.,Farrell K.M.,Mallinson D.J.,et al. Micropaleontologic record of Pliocene and Quaternary paleoenvironments in the southern Albemarle Embayment, North Carolina, U.S.A[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,457
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