Radiocarbon Dates and Late-Quaternary Stratigraphy from Mamontova Gora, Unglaciated Central Yakutia, Siberia, U.S.S.R.

A fine exposure of perennially frozen ice-rich silt and associated flora and vertebrate fauna of late-Quaternary age exists at Mamontova Gora along the Aldan River in central Yakutia, Siberia, U.S.S.R. The silt deposit caps a 50-m-high terrace and consists of three units. An upper layer 1–2 m thick...

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Published in:Quaternary Research
Main Authors: Péwé, Troy L., Journaux, André, Stuckenrath, Robert
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1977
Subjects:
Online Access:http://dx.doi.org/10.1016/0033-5894(77)90056-4
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spelling crcambridgeupr:10.1016/0033-5894(77)90056-4 2024-06-09T07:50:08+00:00 Radiocarbon Dates and Late-Quaternary Stratigraphy from Mamontova Gora, Unglaciated Central Yakutia, Siberia, U.S.S.R. Péwé, Troy L. Journaux, André Stuckenrath, Robert 1977 http://dx.doi.org/10.1016/0033-5894(77)90056-4 http://api.elsevier.com/content/article/PII:0033589477900564?httpAccept=text/xml http://api.elsevier.com/content/article/PII:0033589477900564?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400028611 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 8, issue 1, page 51-63 ISSN 0033-5894 1096-0287 journal-article 1977 crcambridgeupr https://doi.org/10.1016/0033-5894(77)90056-4 2024-05-15T13:04:18Z A fine exposure of perennially frozen ice-rich silt and associated flora and vertebrate fauna of late-Quaternary age exists at Mamontova Gora along the Aldan River in central Yakutia, Siberia, U.S.S.R. The silt deposit caps a 50-m-high terrace and consists of three units. An upper layer 1–2 m thick overlies a 10–15-m-thick brownish to black silt layer. The lower silt layer is greenish to gray and about 15 m thick. All the silt is well sorted with 60% of the particles falling between 0.005 and 0.5 mm in diameter and is generally chemically and mineralogically homogeneous. The middle unit contains may extinct vertebrate mammal remains and ice wedges. The lower unit contains little vegetation and no ice wedges. The silt is widespread and exists as a loamy blanket on terraces at various elevations on both sides of the lower Aldan River. The origin of the silt blanket of late-Quaternary age in central Yakutia has long been controversial. Various hypotheses have been suggested, including lacustrine and alluvial, as well as frost-action origins. It is sometimes referred to as loess-like loam. Péwé believes the silt at Mamontova Gora is loess, some of which has been retransported very short distances by water. The silt probably was blown from wide, braided, unvegetated flood plains of rivers draining nearby glaciers. The silt deposits are late Quaternary in age and probably associated with the Maximum glaciation (Samarov) and Sartan and Syryan glaciations of Wisconsinan age. On the basis of biostratigraphy, 10 radiocarbon dates, and their relation to the nearby glacial record, it is felt that the upper unit at Mamontova Gora is Holocene and the middle unit is Wisconsinan. The youngest date available from the middle unit at this particular location is 26,000 years. Dates greater than 56,000 years were obtained in the lower part of the middle unit. The lower unit is definitely beyond the range of radiocarbon dating and probably is older than the last interglacial. The sediment, fauna, ice wedges, stratigraphy, and age of ... Article in Journal/Newspaper Yakutia Siberia Cambridge University Press Aldan ENVELOPE(129.546,129.546,63.447,63.447) Gora ENVELOPE(42.420,42.420,63.021,63.021) Péwé ENVELOPE(164.300,164.300,-77.933,-77.933) Quaternary Research 8 1 51 63
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description A fine exposure of perennially frozen ice-rich silt and associated flora and vertebrate fauna of late-Quaternary age exists at Mamontova Gora along the Aldan River in central Yakutia, Siberia, U.S.S.R. The silt deposit caps a 50-m-high terrace and consists of three units. An upper layer 1–2 m thick overlies a 10–15-m-thick brownish to black silt layer. The lower silt layer is greenish to gray and about 15 m thick. All the silt is well sorted with 60% of the particles falling between 0.005 and 0.5 mm in diameter and is generally chemically and mineralogically homogeneous. The middle unit contains may extinct vertebrate mammal remains and ice wedges. The lower unit contains little vegetation and no ice wedges. The silt is widespread and exists as a loamy blanket on terraces at various elevations on both sides of the lower Aldan River. The origin of the silt blanket of late-Quaternary age in central Yakutia has long been controversial. Various hypotheses have been suggested, including lacustrine and alluvial, as well as frost-action origins. It is sometimes referred to as loess-like loam. Péwé believes the silt at Mamontova Gora is loess, some of which has been retransported very short distances by water. The silt probably was blown from wide, braided, unvegetated flood plains of rivers draining nearby glaciers. The silt deposits are late Quaternary in age and probably associated with the Maximum glaciation (Samarov) and Sartan and Syryan glaciations of Wisconsinan age. On the basis of biostratigraphy, 10 radiocarbon dates, and their relation to the nearby glacial record, it is felt that the upper unit at Mamontova Gora is Holocene and the middle unit is Wisconsinan. The youngest date available from the middle unit at this particular location is 26,000 years. Dates greater than 56,000 years were obtained in the lower part of the middle unit. The lower unit is definitely beyond the range of radiocarbon dating and probably is older than the last interglacial. The sediment, fauna, ice wedges, stratigraphy, and age of ...
format Article in Journal/Newspaper
author Péwé, Troy L.
Journaux, André
Stuckenrath, Robert
spellingShingle Péwé, Troy L.
Journaux, André
Stuckenrath, Robert
Radiocarbon Dates and Late-Quaternary Stratigraphy from Mamontova Gora, Unglaciated Central Yakutia, Siberia, U.S.S.R.
author_facet Péwé, Troy L.
Journaux, André
Stuckenrath, Robert
author_sort Péwé, Troy L.
title Radiocarbon Dates and Late-Quaternary Stratigraphy from Mamontova Gora, Unglaciated Central Yakutia, Siberia, U.S.S.R.
title_short Radiocarbon Dates and Late-Quaternary Stratigraphy from Mamontova Gora, Unglaciated Central Yakutia, Siberia, U.S.S.R.
title_full Radiocarbon Dates and Late-Quaternary Stratigraphy from Mamontova Gora, Unglaciated Central Yakutia, Siberia, U.S.S.R.
title_fullStr Radiocarbon Dates and Late-Quaternary Stratigraphy from Mamontova Gora, Unglaciated Central Yakutia, Siberia, U.S.S.R.
title_full_unstemmed Radiocarbon Dates and Late-Quaternary Stratigraphy from Mamontova Gora, Unglaciated Central Yakutia, Siberia, U.S.S.R.
title_sort radiocarbon dates and late-quaternary stratigraphy from mamontova gora, unglaciated central yakutia, siberia, u.s.s.r.
publisher Cambridge University Press (CUP)
publishDate 1977
url http://dx.doi.org/10.1016/0033-5894(77)90056-4
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long_lat ENVELOPE(129.546,129.546,63.447,63.447)
ENVELOPE(42.420,42.420,63.021,63.021)
ENVELOPE(164.300,164.300,-77.933,-77.933)
geographic Aldan
Gora
Péwé
geographic_facet Aldan
Gora
Péwé
genre Yakutia
Siberia
genre_facet Yakutia
Siberia
op_source Quaternary Research
volume 8, issue 1, page 51-63
ISSN 0033-5894 1096-0287
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op_doi https://doi.org/10.1016/0033-5894(77)90056-4
container_title Quaternary Research
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