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Proceedings of the Estonian Academy of Sciences. Geology最新文献

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ФРАМБОИДАЛЬНЫЙ ПИРИТ В СЛЕДАХ ЖИЗНЕДЕЯТЕЛЬНОСТИ ОРГАНИЗМОВ В ОСАДКАХ НИЖНЕГО КЕМБРИЯ ЭСТОНИИ 爱沙尼亚下寒武纪降水中的有机体生命痕迹
Pub Date : 1900-01-01 DOI: 10.3176/geol.1990.3.02
I. Tammeaid
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引用次数: 0
CURRENT STATE AND NEW TRENDS IN THE QUATERNARY GEOLOGY OF THE BALTIC STATES 波罗的海国家第四纪地质的现状和新趋势
Pub Date : 1900-01-01 DOI: 10.3176/geol.1995.1.01
O. Aboltiņš, A. Gaigalas, A. Raukas
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引用次数: 6
FOUR NEW BRACHIOPOD GENERA OF THE SUBFAMILY OEPIKINAE (STROPHOMENACEA) FROM THE ORDOVICIAN OF ESTONIA 文章标题爱沙尼亚奥陶系水蝶亚科腕足动物四新属
Pub Date : 1900-01-01 DOI: 10.3176/geol.1993.2.02
A. Rõõmusoks
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引用次数: 3
SOME BRACHIOPOD GENERA OF THE SUBFAMILY STROPHOMENINAE FROM THE ORDOVICIAN OF ESTONIA 爱沙尼亚奥陶系水蝶亚科腕足类的若干属
Pub Date : 1900-01-01 DOI: 10.3176/geol.1993.3.02
A. Rõõmusoks
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引用次数: 4
MAARDLATE HÕLVAMISE PÕHIPROBLEEMIDEST EESTIS
Pub Date : 1900-01-01 DOI: 10.3176/geol.1991.1.05
A. Teedumäe
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引用次数: 0
THE PLATYCERATACEAN GASTROPOD CYCLONEMA (CYCLONEMA) HIIUMAA TEICHERT, 1928 FROM THE LLANDOVERY (SILURIAN) OF ESTONIA platyceratacean腹足动物cyclonema (cyclonema) hiiumaa teichert, 1928年生于爱沙尼亚的llandovery(志留纪)
Pub Date : 1900-01-01 DOI: 10.3176/geol.1995.3.04
M. Isakar
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引用次数: 0
MULTIVARIATE ANALYSIS OF THVERARTINDUR CLINOPYROXENES, SE ICELAND 冰岛地区斜斜成岩的多变量分析
Pub Date : 1900-01-01 DOI: 10.3176/geol.1996.3.01
A. Soesoo
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引用次数: 0
DIMITRI KALJO 70; p. 262 迪米特里·卡约70;262页。
Pub Date : 1900-01-01 DOI: 10.3176/geol.1998.4.04
A. Raukas, R. Vaikmäe
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引用次数: 0
Chronological data from Estonian Pleistocene 爱沙尼亚更新世的年代资料
Pub Date : 1900-01-01 DOI: 10.3176/geol.2005.1.02
V. Kalm
. Pleistocene chronostratigraphy in Estonia is based on 60 radiocarbon ( 14 C, 14 C AMS), 63 TL/OSL, and 17 10 Be datings from 57 studied sites/sections that cover a time span from approximately 200 000 yr BP to the Pleistocene–Holocene chronostratigraphic boundary. For the first time all scattered data from 40 years of chronological study into Estonian Pleistocene are presented together and critically analysed in regard to validity of obtained ages. Half of the relatively abundant but scattered chronological data cover only the youngest 5000–6000 year part of the Late Weichselian. New OSL datings, together with the results of earlier palynological, carpological, and diatom studies, have invalidated almost one-third of the available 14 C dates, obtained mostly in the late 1960s and 1970s. Thermoluminescence ages from tills, available from the early 1980s, are very inconsistent within the studied sections and are considered to be unreliable because of questionable bleaching of the TL signal. The results of the 10 Be method, recently applied to the study of deglaciation chronology of the Estonian territory, do not contradict the earlier age estimations. However, due to relatively large uncertainties of the method, the results were not able to refine the existing Late-Glacial chronology in Estonia.
. 爱沙尼亚的更新世年代地层是基于57个研究地点/剖面的60个放射性碳(14c, 14c AMS), 63个TL/OSL和17个10be定年,涵盖了从大约20万年BP到更新世-全新世年代地层界线的时间跨度。对爱沙尼亚更新世进行了40年的年代学研究,首次将所有分散的数据放在一起,并对所得年龄的有效性进行了严格的分析。在相对丰富但分散的年代学资料中,有一半只涵盖了晚期魏奇塞利世最年轻的5000-6000年部分。新的OSL年代测定,加上早期孢粉学、湖泊学和硅藻研究的结果,已经使几乎三分之一的现有14c年代无效,这些年代大多是在20世纪60年代末和70年代获得的。从20世纪80年代初获得的tills热释光年龄在研究剖面中非常不一致,并且由于TL信号的可疑漂白而被认为是不可靠的。最近应用于爱沙尼亚领土消冰年表研究的10 Be方法的结果与早先的年龄估计并不矛盾。然而,由于该方法的不确定性相对较大,结果无法完善爱沙尼亚现有的晚冰期年表。
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引用次数: 3
THE ENDOSKELETON OF SHOULDER GIRDLE IN PTYCTODONTS (PLACODERMI) 齿类动物肩带的内骨骼(placodermi)
Pub Date : 1900-01-01 DOI: 10.3176/geol.1991.4.04
A. Ivanov, E. Mark-Kurik, O. Obrucheva
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引用次数: 2
期刊
Proceedings of the Estonian Academy of Sciences. Geology
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