Stratigraphy and sedimentology of a late Pleistocene incised valley fill: a depositional and paleogeographic model for “Cancagua” deposits in north-western Patagonia, Chile
ABSTRACT Late Pleistocene sedimentary deposits outcropping around Valdivia city, locally known as Cancagua, have been subject of contrasting interpretations, from glacial to interglacial sediments. Opposing views emerge from focusing on upstream or coastal sedimentary controls, within a zone were th...
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| Lenguaje: | English |
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Servicio Nacional de Geología y Minería (SERNAGEOMIN)
2018
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oai:scielo:S0718-710620180002001612018-06-14Stratigraphy and sedimentology of a late Pleistocene incised valley fill: a depositional and paleogeographic model for “Cancagua” deposits in north-western Patagonia, ChileVega,Rodrigo M.Mella,MauricioNielsen,Sven N.Pino,Mario Late Pleistocene Cancagua Volcaniclastic Facies analysis Glacial-interglacial cycles Northpatagonia ABSTRACT Late Pleistocene sedimentary deposits outcropping around Valdivia city, locally known as Cancagua, have been subject of contrasting interpretations, from glacial to interglacial sediments. Opposing views emerge from focusing on upstream or coastal sedimentary controls, within a zone were these potentially overlap through a full glacial cycle. Here we present the first detailed facies analysis and a broad chronological framework, reconciling previous interpretations in a single paleogeographic model that encompasses the last glacial cycle. Seven facies associations are described, interpreted as an estuarine complex developed primarily during the last glacial cycle’s highstand, yet accumulating sediments during a substantial part of the falling stage. These results offer the opportunity to extend paleoenvironmental records through a full glacial cycle in northern Patagonia.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.45 n.2 20182018-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062018000200161en10.5027/andgeov45n2-3030 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
Late Pleistocene Cancagua Volcaniclastic Facies analysis Glacial-interglacial cycles Northpatagonia |
| spellingShingle |
Late Pleistocene Cancagua Volcaniclastic Facies analysis Glacial-interglacial cycles Northpatagonia Vega,Rodrigo M. Mella,Mauricio Nielsen,Sven N. Pino,Mario Stratigraphy and sedimentology of a late Pleistocene incised valley fill: a depositional and paleogeographic model for “Cancagua” deposits in north-western Patagonia, Chile |
| description |
ABSTRACT Late Pleistocene sedimentary deposits outcropping around Valdivia city, locally known as Cancagua, have been subject of contrasting interpretations, from glacial to interglacial sediments. Opposing views emerge from focusing on upstream or coastal sedimentary controls, within a zone were these potentially overlap through a full glacial cycle. Here we present the first detailed facies analysis and a broad chronological framework, reconciling previous interpretations in a single paleogeographic model that encompasses the last glacial cycle. Seven facies associations are described, interpreted as an estuarine complex developed primarily during the last glacial cycle’s highstand, yet accumulating sediments during a substantial part of the falling stage. These results offer the opportunity to extend paleoenvironmental records through a full glacial cycle in northern Patagonia. |
| author |
Vega,Rodrigo M. Mella,Mauricio Nielsen,Sven N. Pino,Mario |
| author_facet |
Vega,Rodrigo M. Mella,Mauricio Nielsen,Sven N. Pino,Mario |
| author_sort |
Vega,Rodrigo M. |
| title |
Stratigraphy and sedimentology of a late Pleistocene incised valley fill: a depositional and paleogeographic model for “Cancagua” deposits in north-western Patagonia, Chile |
| title_short |
Stratigraphy and sedimentology of a late Pleistocene incised valley fill: a depositional and paleogeographic model for “Cancagua” deposits in north-western Patagonia, Chile |
| title_full |
Stratigraphy and sedimentology of a late Pleistocene incised valley fill: a depositional and paleogeographic model for “Cancagua” deposits in north-western Patagonia, Chile |
| title_fullStr |
Stratigraphy and sedimentology of a late Pleistocene incised valley fill: a depositional and paleogeographic model for “Cancagua” deposits in north-western Patagonia, Chile |
| title_full_unstemmed |
Stratigraphy and sedimentology of a late Pleistocene incised valley fill: a depositional and paleogeographic model for “Cancagua” deposits in north-western Patagonia, Chile |
| title_sort |
stratigraphy and sedimentology of a late pleistocene incised valley fill: a depositional and paleogeographic model for “cancagua” deposits in north-western patagonia, chile |
| publisher |
Servicio Nacional de Geología y Minería (SERNAGEOMIN) |
| publishDate |
2018 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062018000200161 |
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