Stratigraphic Framework, Paleoenvironments, and Indigenous Terraforming of Inshore Estuarine Subbasins in Tampa Bay, Florida, U.S.A.
Stratigraphic Framework, Paleoenvironments, and Indigenous Terraforming of Inshore Estuarine Subbasins in Tampa Bay, Florida, U.S.A.
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DOI：
10.2112/jcoastres-d-22-00128.1
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发表时间：
2023-06
影响因子：
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通讯作者：
Kendal Jackson;Ping Wang;Thomas J. Pluckhahn;Jaime A. Rogers;V. Thompson
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文献类型：
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作者：
Kendal Jackson;Ping Wang;Thomas J. Pluckhahn;Jaime A. Rogers;V. Thompson
杰克逊;王，P.; Pluckhahn，T.J.;罗杰斯，J.A.，和汤普森，V.D.，2023.佛罗里达坦帕湾近岸河口次盆地的地层格架、古环境和本土地形形成，美国海岸研究杂志，39（5），779-815。夏洛特（北卡罗来纳州），ISSN 0749-0208。坦帕湾是位于佛罗里达中部半岛墨西哥湾沿岸的一个岩溶控制的河口系统。虽然以前的工作已经重建了晚更新世环境（约。20-11.5 kya）和早期海洋影响（约。8-5.5千年），在海湾的较深的中央部分，浅近岸次盆地的河口发展仍然知之甚少。在全新世晚期，土著社会用大量的河口软体动物壳改造了海岸线，这些人为地貌构成了部分封闭边缘潮汐海湾的海岸屏障。本研究结合沉积物取样与考古发掘，重建坦帕湾内四个近岸次盆地的全新世河口演化。本研究综合了沉积学、宏体化石和考古学资料，描述和区分了7个沉积相和18个亚相，代表了底部的中新世风化灰岩，上覆有晚更新世淡水湿地沉积物，其次是全新世河口沉积物和晚全新世贝壳地形化定居点。利用四个地层剖面和>100个放射性碳分析来解释近岸河口发展的序列，在地质和古环境框架内解释古贝壳土著居民点，并解决全新世中晚期海平面历史的要素。
ABSTRACT Jackson, K.; Wang, P.; Pluckhahn, T.J.; Rogers, J.A., and Thompson, V.D., 2023. Stratigraphic framework, paleoenvironments, and Indigenous terraforming of inshore estuarine subbasins in Tampa Bay, Florida, U.S.A. Journal of Coastal Research, 39(5), 779–815. Charlotte (North Carolina), ISSN 0749-0208. Tampa Bay is a karst-controlled estuary system on Florida's central peninsular Gulf of Mexico coast. Although previous work has reconstructed late-Pleistocene environments (ca. 20–11.5 kya) and early marine influence (ca. 8–5.5 kya) in deeper central portions of the bay, the estuarine development of the shallow inshore subbasins remains poorly understood. Across the late Holocene, Indigenous societies terraformed the coastal strand with large volumes of estuarine mollusk shell, and these anthropogenic landforms constitute coastal barriers that partially enclose marginal tidal bayous. This study integrates sediment coring and archaeological excavations to reconstruct the Holocene estuarine evolution of four inshore subbasins within Tampa Bay. This study synthesizes sedimentological, macrofossil, and archaeological data to describe and differentiate seven sedimentary facies and 18 subfacies representing weathered Miocene limestone at the base, overlain by late-Pleistocene freshwater wetland deposits, followed by Holocene estuarine sediments and late-Holocene shell-terraformed settlements. Four stratigraphic cross-sections and >100 radiocarbon assays are utilized to interpret the sequences of inshore estuary development, situate ancient shell-bearing Native settlements within a geologic and paleoenvironmental framework, and resolve elements of mid- and late-Holocene sea-level history.