![Submillennial palynology and palaeoecology of the last glaciation at Taiquemo (~50,000calyr, MIS 2-4) in southern Chile [An article from: Quaternary Science Reviews]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR7FLS.jpg)
Submillennial palynology and palaeoecology of the last glaciation at Taiquemo (~50,000calyr, MIS 2-4) in southern Chile [An article from: Quaternary Science Reviews]
Book Details
Author(s)C.J. Heusser, L.E. Heusser
PublisherElsevier
ISBN / ASINB000RR7FLS
ISBN-13978B000RR7FL1
MarketplaceFrance 🇫🇷
Description
This digital document is a journal article from Quaternary Science Reviews, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Stratigraphic palynology of core HE94-2B from a mire at Taiquemo (42.17^oS, 73.60^oW) on Isla Grande de Chiloe is one of the most closely sampled, continuous Pleistocene records in southern South America. Chronology of the 655-cm core that extends from Marine Isotope Stage (MIS) 4 through the Lateglacial is controlled by 27 finite radiocarbon dates. Sampled at 1-cm intervals, the high temporal resolution (mean ~85yrcm^-^1) captures short-term palaeoecological changes and successional restabilization of plant communities. Preponderance of Gramineae (grass) with Nothofagus dombeyi type (southern beech) characterizing Subantarctic Parkland under a cold climate in MIS 4 was followed by a conspicuously milder interval that lasted for some ten millennia in MIS 3. Of greater frequency and diversity at this time were more thermophilic taxa associated with North Patagonian Evergreen Forest (Podocarpus, Pilgerodendron type, Pseudopanax, Myrtaceae). Subsequently with increasing cold and hyperhumidity, N. dombeyi type-Gramineae assemblages that included Subantarctic Parkland indicator taxa (Lepidothamnus, Astelia, Gaimardia) increased stepwise in MIS 2-3. Parkland maxima in MIS 2 during the Last Glacial Maximum (LGM) date to glacial advances between ~17,800 and 33,400calyr BP. On deglaciation, Lateglacial North Patagonian Evergreen Forest was subject to short-term stadial and interstadial climatic fluctuations. The high-resolution Taiquemo pollen record details and supports previous conclusions of interhemispheric synchrony of climatic and glacial events.
Description:
Stratigraphic palynology of core HE94-2B from a mire at Taiquemo (42.17^oS, 73.60^oW) on Isla Grande de Chiloe is one of the most closely sampled, continuous Pleistocene records in southern South America. Chronology of the 655-cm core that extends from Marine Isotope Stage (MIS) 4 through the Lateglacial is controlled by 27 finite radiocarbon dates. Sampled at 1-cm intervals, the high temporal resolution (mean ~85yrcm^-^1) captures short-term palaeoecological changes and successional restabilization of plant communities. Preponderance of Gramineae (grass) with Nothofagus dombeyi type (southern beech) characterizing Subantarctic Parkland under a cold climate in MIS 4 was followed by a conspicuously milder interval that lasted for some ten millennia in MIS 3. Of greater frequency and diversity at this time were more thermophilic taxa associated with North Patagonian Evergreen Forest (Podocarpus, Pilgerodendron type, Pseudopanax, Myrtaceae). Subsequently with increasing cold and hyperhumidity, N. dombeyi type-Gramineae assemblages that included Subantarctic Parkland indicator taxa (Lepidothamnus, Astelia, Gaimardia) increased stepwise in MIS 2-3. Parkland maxima in MIS 2 during the Last Glacial Maximum (LGM) date to glacial advances between ~17,800 and 33,400calyr BP. On deglaciation, Lateglacial North Patagonian Evergreen Forest was subject to short-term stadial and interstadial climatic fluctuations. The high-resolution Taiquemo pollen record details and supports previous conclusions of interhemispheric synchrony of climatic and glacial events.
