Ostracod assemblages indicating a low water level episode of Lake Peipsi at the beginning of the Holocene
Three sediment cores from the northern part of Lake Peipsi in eastern Estonia were analysed for their ostracod content. The investigated sediments consist of late Weichselian glaciolacustrine varved and homogeneous clay, lake marl, and gyttja. Altogether eight freshwater ostracod species were identi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Estonian Academy Publishers
2009-06-01
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| Series: | Estonian Journal of Earth Sciences |
| Subjects: | |
| Online Access: | http://eap.ee/public/Estonian_Journal_of_Earth_Sciences/2009/issue_2/earth-2009-2-133-147.pdf |
| _version_ | 1818508073996648448 |
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| author | Niinemets, Eve Hang, Tiit |
| author_facet | Niinemets, Eve Hang, Tiit |
| author_sort | Niinemets, Eve |
| collection | DOAJ |
| description | Three sediment cores from the northern part of Lake Peipsi in eastern Estonia were analysed for their ostracod content. The investigated sediments consist of late Weichselian glaciolacustrine varved and homogeneous clay, lake marl, and gyttja. Altogether eight freshwater ostracod species were identified. The distribution of ostracods in L. Peipsi deposits is mostly limited to the lake marl interval. Ostracods made their appearance in shallow-water conditions and were represented by species preferring cold water. The continuous presence of Ilyocypris bradyi refers to the existence of a shallow body of water through the whole period of marl accumulation. Two sediment intervals where Herpetocypris reptans is present and Darwinula stevensoni is absent are interpreted as regressional episodes during the low lake level stage, which were possibly caused by a temporary warming accompanied by increased productivity. Water level in L. Peipsi during the late Weichselian–Early Holocene was ca 10 m lower than at present. According to palynological and radiocarbon data, lake marl with the presence of calcareous fossils started to accumulate at the Younger Dryas–Preboreal transition and continued through the entire Preboreal Chronozone. |
| first_indexed | 2024-12-10T22:26:48Z |
| format | Article |
| id | doaj.art-ff65f32c2f52448697b20df1375673be |
| institution | Directory Open Access Journal |
| issn | 1736-4728 |
| language | English |
| last_indexed | 2024-12-10T22:26:48Z |
| publishDate | 2009-06-01 |
| publisher | Estonian Academy Publishers |
| record_format | Article |
| series | Estonian Journal of Earth Sciences |
| spelling | doaj.art-ff65f32c2f52448697b20df1375673be2022-12-22T01:31:10ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47282009-06-01582133147Ostracod assemblages indicating a low water level episode of Lake Peipsi at the beginning of the HoloceneNiinemets, EveHang, TiitThree sediment cores from the northern part of Lake Peipsi in eastern Estonia were analysed for their ostracod content. The investigated sediments consist of late Weichselian glaciolacustrine varved and homogeneous clay, lake marl, and gyttja. Altogether eight freshwater ostracod species were identified. The distribution of ostracods in L. Peipsi deposits is mostly limited to the lake marl interval. Ostracods made their appearance in shallow-water conditions and were represented by species preferring cold water. The continuous presence of Ilyocypris bradyi refers to the existence of a shallow body of water through the whole period of marl accumulation. Two sediment intervals where Herpetocypris reptans is present and Darwinula stevensoni is absent are interpreted as regressional episodes during the low lake level stage, which were possibly caused by a temporary warming accompanied by increased productivity. Water level in L. Peipsi during the late Weichselian–Early Holocene was ca 10 m lower than at present. According to palynological and radiocarbon data, lake marl with the presence of calcareous fossils started to accumulate at the Younger Dryas–Preboreal transition and continued through the entire Preboreal Chronozone.http://eap.ee/public/Estonian_Journal_of_Earth_Sciences/2009/issue_2/earth-2009-2-133-147.pdfLake Peipsiostracodslate Weichselianearly Holocenelithostratigraphylake level changes |
| spellingShingle | Niinemets, Eve Hang, Tiit Ostracod assemblages indicating a low water level episode of Lake Peipsi at the beginning of the Holocene Estonian Journal of Earth Sciences Lake Peipsi ostracods late Weichselian early Holocene lithostratigraphy lake level changes |
| title | Ostracod assemblages indicating a low water level episode of Lake Peipsi at the beginning of the Holocene |
| title_full | Ostracod assemblages indicating a low water level episode of Lake Peipsi at the beginning of the Holocene |
| title_fullStr | Ostracod assemblages indicating a low water level episode of Lake Peipsi at the beginning of the Holocene |
| title_full_unstemmed | Ostracod assemblages indicating a low water level episode of Lake Peipsi at the beginning of the Holocene |
| title_short | Ostracod assemblages indicating a low water level episode of Lake Peipsi at the beginning of the Holocene |
| title_sort | ostracod assemblages indicating a low water level episode of lake peipsi at the beginning of the holocene |
| topic | Lake Peipsi ostracods late Weichselian early Holocene lithostratigraphy lake level changes |
| url | http://eap.ee/public/Estonian_Journal_of_Earth_Sciences/2009/issue_2/earth-2009-2-133-147.pdf |
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