Reconstruction of the late Holocene paleoenvironment of the western Beagle Channel (Argentina) based on a palynological analysis

被引：10

作者：

Soledad Candel, Maria ^{[1
]}

Louwye, Stephen ^{[2
]}

Maria Borromei, Ana ^{[3
]}

机构：

[1] CADIC CONICET, Lab Geomorfol & Cuaternario, B Houssay 200, RA-9410 Ushuaia, Argentina

[2] Univ Ghent, Dept Geol & Soil Sci, Res Unit Palaeontol, Krijgslaan 281 S8-WE13, B-9000 Ghent, Belgium

[3] Univ Nacl Sur, Dept Geog, INGEOSUR CONICET, San Juan 670,B8000ICN, Bahia Blanca, Buenos Aires, Argentina

来源：

QUATERNARY INTERNATIONAL | 2017年 / 442卷

关键词：

Marine palaeoenvironments; Late Holocene; Beagle channel; Tierra del Fuego; TIERRA-DEL-FUEGO; SOUTHERNMOST SOUTH-AMERICA; DINOFLAGELLATE CYSTS; QUATERNARY; GLACIER; FJORD; PALYNOFACIES; GLACIATIONS; EVOLUTION; PATAGONIA;

D O I：

10.1016/j.quaint.2016.01.074

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Palynological analysis was performed on sediment samples from Arroyo Baliza site (54 degrees 51' S, 68 degrees 33' W), western sector of the Beagle Channel, Tierra del Fuego, Argentina, in order to reconstruct the palaeoenvironmental history during the Holocene marine transgressive-regressive cycle in the Beagle Channel. The palynological analysis reveals the presence of a closed-canopy Nothofagus forest development in the coastal areas under a cold, wet and variable climate conditions during the late Holocene. The marine assemblage composition shows similarities to those modern assemblages recorded in the surface samples from the Beagle Channel, characterised by the dominance of Peridiniales taxa, suggesting environmental conditions during the late Holocene comparable to today. The increasing salinity during middle Holocene was accompanied by an increase in number and diversity of the microplanktonic assemblages, suggesting the gradual installation of a marine environment as it exists today in the Beagle Channel. (C) 2016 Elsevier Ltd and INQUA. All rights reserved.

引用

页码：2 / 12

页数：11

共 59 条

[21] ORGANIC FACIES AS A TOOL FOR RECORDING EUSTATIC VARIATIONS IN MARINE FINE-GRAINED CARBONATES - EXAMPLE OF THE BERRIASIAN STRATOTYPE AT BERRIAS (ARDECHE, SE FRANCE) [J].

GORIN, GE ;

STEFFEN, D .

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, 1991, 85 (3-4) :303-320

[22]

Grill S., 2002, Revista Espanola de Micropaleontologia, V34, P145

[23]

Grimm E.C., 2004, TGView 2.0.2

[24]

Grosfjeld K, 2009, NORW J GEOL, V89, P121

[25]

Heusser C.J., 2003, ICE AGE SO ANDES CHR, P1

[26] Deglacial paleoclimate of the American sector of the Southern Ocean:: Late Glacial-Holocene records from the latitude of Canal Beagle (55°S), Argentine Tierra del Fuego [J].

Heusser, CJ .

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, 1998, 141 (3-4) :277-301

[27]

Isla F., 1999, REV ASOC GEOL ARGENT, V54, P307

[28] Dinoflagellate cyst stratigraphy and palaeoecology of the Pliocene in northern Belgium southern North Sea Basin [J].

Louwye, S ;

Head, MJ ;

De Schepper, S .

GEOLOGICAL MAGAZINE, 2004, 141 (03) :353-378

[29] Late and postglacial vegetation and fire history in Southern Patagonia and Tierra del Fuego [J].

Markgraf, Vera ;

Huber, Ulli M. .

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, 2010, 297 (02) :351-366

[30] Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina [J].

Menounos, Brian ;

Clague, John J. ;

Osborn, Gerald ;

Davis, P. Thompson ;

Ponce, Federico ;

Goehring, Brent ;

Maurer, Malyssa ;

Rabassa, Jorge ;

Coronato, Andrea ;

Marr, Rob .

QUATERNARY SCIENCE REVIEWS, 2013, 77 :70-79

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