(Table 1) Age determination of Cape Shpindler, Yugorski Peninsula, northwest Russia
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2001
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| _version_ | 1867168084039565312 |
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| author | Manley, William F Lokrantz, Hanna Gataullin, Valery Ingólfsson, Ólafur Forman, Steven L Andersson, Torbjörn |
| author_facet | Manley, William F Lokrantz, Hanna Gataullin, Valery Ingólfsson, Ólafur Forman, Steven L Andersson, Torbjörn |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Depositional environments, stratigraphic relations, and 35 new AMS 14C dates at Cape Shpindler, Yugorski Peninsula, help constrain the late Pleistocene glacial and environmental history of the southern Kara Sea region. Fifteen- to fifty-meter-high coastal exposures reveal a complex package of shallow marine, fluvial, glacial, and postglacial deposits, and are documented here in a 19-km-long cross-section and eight vertical sections. The shallow marine (Unit A), estuarine or prodeltaic (Unit B), and fluvio-deltaic (Unit C) deposits contain an interglacial molluscan fauna, yield radiocarbon dates greater than 40 ka, and may correspond with a regional sea-level highstand during the Eemian. These units are overlain by a diamicton (Unit D), and are pervasively deformed by folds and low- to high-angle faults into a stacked glaciotectonic accretionary complex. The diamicton (Unit D) is a subglacial till, and associated massive ground ice with deformed debris bands (Unit E) appears to be relict glacier ice. Glaciotectonic structures document both southward- and northward-directed glacier movement. Above the till and associated glaciotectonic horizons lies 0- to 11-m-thick postglacial deposits of peatland, eolian, fluvial, and primarily lacustrine origin (Unit F). The postglacial deposits yield radiocarbon ages of 12.8 to 0.8 ka. Thus, at least one regional glaciation is prominently represented in the stratigraphy, and occurred probably after the Eemian but before 12.8 ka. We infer that the bulk of the glacial record corresponds with southward advance by an early Weichselian Kara Sea Ice Sheet, in agreement with other recently documented, regional records from Yamal Peninsula and the Pechora Basin. The timing and source of northward-directed glacier ice are less well constrained. Across the broad expanse of the Eurasian Arctic, Quaternary stratigraphy is still sparsely documented. The new data from Cape Shpindler fill a spatial gap in paleoenvironmental research. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_728838 |
| institution | PANGAEA |
| language | en |
| publishDate | 2001 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Age determination of Cape Shpindler, Yugorski Peninsula, northwest Russia Manley, William F Lokrantz, Hanna Gataullin, Valery Ingólfsson, Ólafur Forman, Steven L Andersson, Torbjörn Age, 14C AMS; Age, dated; Age, dated, standard deviation; Age, dated material; Cape_Shpindler; Distance; ELEVATION; Lithologic unit/sequence; OUTCROP; Outcrop sample; Quaternary Environment of the Eurasian North; QUEEN; Russia; Sample code/label; Sample code/label 2 Depositional environments, stratigraphic relations, and 35 new AMS 14C dates at Cape Shpindler, Yugorski Peninsula, help constrain the late Pleistocene glacial and environmental history of the southern Kara Sea region. Fifteen- to fifty-meter-high coastal exposures reveal a complex package of shallow marine, fluvial, glacial, and postglacial deposits, and are documented here in a 19-km-long cross-section and eight vertical sections. The shallow marine (Unit A), estuarine or prodeltaic (Unit B), and fluvio-deltaic (Unit C) deposits contain an interglacial molluscan fauna, yield radiocarbon dates greater than 40 ka, and may correspond with a regional sea-level highstand during the Eemian. These units are overlain by a diamicton (Unit D), and are pervasively deformed by folds and low- to high-angle faults into a stacked glaciotectonic accretionary complex. The diamicton (Unit D) is a subglacial till, and associated massive ground ice with deformed debris bands (Unit E) appears to be relict glacier ice. Glaciotectonic structures document both southward- and northward-directed glacier movement. Above the till and associated glaciotectonic horizons lies 0- to 11-m-thick postglacial deposits of peatland, eolian, fluvial, and primarily lacustrine origin (Unit F). The postglacial deposits yield radiocarbon ages of 12.8 to 0.8 ka. Thus, at least one regional glaciation is prominently represented in the stratigraphy, and occurred probably after the Eemian but before 12.8 ka. We infer that the bulk of the glacial record corresponds with southward advance by an early Weichselian Kara Sea Ice Sheet, in agreement with other recently documented, regional records from Yamal Peninsula and the Pechora Basin. The timing and source of northward-directed glacier ice are less well constrained. Across the broad expanse of the Eurasian Arctic, Quaternary stratigraphy is still sparsely documented. The new data from Cape Shpindler fill a spatial gap in paleoenvironmental research. |
| title | (Table 1) Age determination of Cape Shpindler, Yugorski Peninsula, northwest Russia |
| topic | Age, 14C AMS; Age, dated; Age, dated, standard deviation; Age, dated material; Cape_Shpindler; Distance; ELEVATION; Lithologic unit/sequence; OUTCROP; Outcrop sample; Quaternary Environment of the Eurasian North; QUEEN; Russia; Sample code/label; Sample code/label 2 |
| url | https://doi.org/10.1594/PANGAEA.728838 |