干旱区生态环境知识资源中心(Arid): A multi-proxy reconstruction of depositional environment of a Late Pleistocene submerged site from the Central Coast of Chile (32 degrees): Implications for drowned sites

Arid

DOI	10.1016/j.quaint.2021.06.005
	A multi-proxy reconstruction of depositional environment of a Late Pleistocene submerged site from the Central Coast of Chile (32 degrees): Implications for drowned sites
	Flores-Aqueveque, Valentina; Ortega, Cristina; Fernandez, Rodrigo; Carabias, Diego; Simonetti, Renato; Cartajena, Isabel; Diaz, Laura; Gonzalez, Charles
通讯作者	Flores-Aqueveque, V (corresponding author), Univ Chile, Fac Cie Fisicas Matemat, Dept Geol, Santiago, Chile.
来源期刊	QUATERNARY INTERNATIONAL
ISSN	1040-6182
EISSN	1873-4553
出版年	2021
卷号	601 页码:15-27
英文摘要	Site GNL Quintero 1 (GNLQ1), located on the central Chilean coast (32 degrees S), remains the only submerged fini-Pleistocene landscape reported for the southeastern Pacific coast to date. This unique site is characterized by a high frequency and diversity of extinct terrestrial faunal remains supported within a fine-grained sedimentary matrix. Several studies have been performed on the faunal assemblage; however, the sedimentary environment in which the site was formed still remains unclear. In this work, stratigraphic, sedimentological and geochemical analyses conducted on two marine cores are combined with seismic data to determine the depositional conditions affecting the formation of this exceptional shallowly buried submerged landscape. Previous results indicated that site GNLQ1 formed, at least between 28 and 21 ka, in an aquifer-fed freshwater lagoon that developed on a fluvial plain. Here, we show a three-stage sedimentological evolution. In the first stage, a shallow restricted freshwater lagoon formed under relatively arid conditions. Subsequently, the lagoon expanded and deepened under the humid climatic conditions that affected central Chile during the Last Glacial Maximum (LGM). Finally, around 8.5-8 ka, the most recent post-glacial marine transgression (PMT) submerged the site, probably eroding the Late Pleistocene - Early Holocene part of the sequence. Currently, the site lies at ca. 13 m b.s.l. within the shoreface of present-day Quintero Bay, 650 m from the current shoreline. This enhanced understanding of GNLQ1's evolution offers a new perspective on resource availability on the coastal shelf of western South America during the Late Pleistocene, as well as highlighting the unexpected paleontological potential of this area and encouraging future archaeological research of potential prehistoric evidence within these drowned landscapes.
英文关键词	Submerged landscape Last glacial maximum South America Sedimentary environment
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000688610000002
WOS关键词	SEA-LEVEL ; SPATIAL-DISTRIBUTION ; MARINE-SEDIMENTS ; TRACE-ELEMENTS ; HOLOCENE ; PHOSPHORUS ; QUINTERO ; COPPER ; SOILS ; TERRESTRIAL
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367752
作者单位	[Flores-Aqueveque, Valentina; Fernandez, Rodrigo; Gonzalez, Charles] Univ Chile, Fac Cie Fisicas Matemat, Dept Geol, Santiago, Chile; [Flores-Aqueveque, Valentina; Carabias, Diego; Simonetti, Renato; Cartajena, Isabel] ARQMAR Ctr Maritime Archaeol Res, Southeastern Pacific, Valparaiso, Chile; [Flores-Aqueveque, Valentina] Millennium Nucleus Paleoclimate, ANID Millennium Sci Initiat, Santiago, Chile; [Ortega, Cristina] Univ Cent Chile, Fac Ingn Arquitectura, Escuela Ingn, Santiago, Chile; [Carabias, Diego; Simonetti, Renato] ARKA Maritime Archaeol, Valparaiso, Chile; [Cartajena, Isabel] Univ Chile, Fac Ciencias Sociales, Dept Antropol, Santiago, Chile; [Diaz, Laura] Univ Catolica Norte, Fac Ingn & Ciencias Geol, Dept Ciencias Geol, Antofagasta, Chile
推荐引用方式 GB/T 7714	Flores-Aqueveque, Valentina,Ortega, Cristina,Fernandez, Rodrigo,et al. A multi-proxy reconstruction of depositional environment of a Late Pleistocene submerged site from the Central Coast of Chile (32 degrees): Implications for drowned sites[J],2021,601:15-27.
APA	Flores-Aqueveque, Valentina.,Ortega, Cristina.,Fernandez, Rodrigo.,Carabias, Diego.,Simonetti, Renato.,...&Gonzalez, Charles.(2021).A multi-proxy reconstruction of depositional environment of a Late Pleistocene submerged site from the Central Coast of Chile (32 degrees): Implications for drowned sites.QUATERNARY INTERNATIONAL,601,15-27.
MLA	Flores-Aqueveque, Valentina,et al."A multi-proxy reconstruction of depositional environment of a Late Pleistocene submerged site from the Central Coast of Chile (32 degrees): Implications for drowned sites".QUATERNARY INTERNATIONAL 601(2021):15-27.