搜索结果: 1-15 共查到“地质学 Estonia”相关记录30条 . 查询时间(0.069 秒)
Diagenetic influences on iron-bearing minerals in Devonian carbonate and siliciclastic rocks of Estonia
Devonian diagenesis carbonate rocks siliciclastic rocks mixed carbonate-siliciclastic rocks
2009/10/22
The Estonian Devonian sediments consist of carbonate, siliciclastic, and mixed carbonate-siliciclastic deposits that have undergone extensive dolomitization. Chemical analysis of 165 samples and XRD m...
Holocene buried organic sediments in Estonia
buried organic sediments 14C dates Ancylus Lake Litorina Sea Estonia
2009/10/22
An overview of 85 sites of Holocene buried organic sediments in Estonia is presented. This number includes 45 sites of pre-Ancylus and Ancylus age, which were buried during the Ancylus transgression, ...
A new type of shell structure in a phosphatic brachiopod from the Cambrian of Estonia
Lingulata Ungula shell structure Cambrian Estonia
2009/10/22
Shell structures of Ungula ingrica, U. inornata, and Ungula sp. 1 (Kallavere and Ülgase formations) from Cambrian sandstones of the Mäekalda section in Tallinn, Estonia, were studied. Specif...
New correlations of Telychian (Silurian) bentonites in Estonia
bentonite K-bentonite Telychian sanidine correlation
2009/10/22
Seventy-seven Telychian bentonite samples from six drill-core sections were correlated on the basis of their sanidine composition. In total, bentonites from 43 volcanic eruptions, of which six are new...
Impact-induced and diagenetic changes in minerals in the sandy ejecta of the Kärdla crater,NW Estonia
impact craters ejecta shock metamorphism C-rich particles stable carbon isotopes
2009/10/22
The sand-rich ejecta containing a considerable amount of mineral grains with impact-induced features was studied in five boreholes drilled around the Kärdla impact meteorite structure. Quartz gra...
Conodonts of the Kiviõli Member,Viivikonna Formation (Upper Ordovician) in the Kohtla section,Estonia
conodonts taxonomy biostratigraphy Kukruse Stage Ordovician Estonia
2009/10/22
Conodont faunas from the kukersites and kukersitic limestones of the Kiviõli Member are similar to coeval collections from other sedimentary facies and there are no taxa endemic to this unusual...
Frequency patterns of chitinozoans,scolecodonts,and conodonts in the upper Llandovery and lower Wenlock of the Paatsalu core,western Estonia
microfossil dynamics frequency patterns diversity chitinozoans scolecodonts
2009/10/21
Frequency patterns of chitinozoans, scolecodonts (polychaete jaws), and conodonts in the upper Llandovery and lower Wenlock of the Paatsalu core, western Estonia, are described. Chitinozoans are repre...
Ordovician timescale in Estonia:recent developments
stratigraphy timescale Ordovician graptolites chitinozoans conodonts Estonia
2009/10/21
Over 150 years of progress in the Ordovician geology and stratigraphy of Estonia has resulted in one of the most precise Ordovician timescales in the world. In this paper, an up-to-date version of the...
Dolomitization and sedimentary cyclicity of the Ordovician,Silurian,and Devonian rocks in South Estonia
dolomitization sedimentary cyclicity diagenesis dolomite XRD porosity
2009/10/21
The distribution and composition of dolomitized rocks and stoichiometry of dolomite in southern Estonia in the Ordovician, Silurian, and Devonian were studied on the background of the facies, sediment...
Thelodonts (Agnatha) from the basal beds of the Kuressaare Stage,Ludlow,Upper Silurian of Estonia
Thelodonti Agnatha taxonomy Estonia Ludlow Silurian
2009/10/21
The thelodont Loganellia cuneata (Gross) is redescribed and new thelodont taxa Paralogania perensae sp. nov., Nethertonodus laadjalaensis sp. nov., and Longodus acicularis gen. et sp. nov. are establi...
Intraspecific variation in Wenlock tabulate corals from Saaremaa (Estonia) and its taxonomic implications
Wenlock Baltoscandia tabulates intraspecific variation
2009/10/21
Different aspects of intraspecific variation in Wenlock tabulate corals are discussed. Intracorallum and intraspecific variation is demonstrated in specimens within the collection from one locality. T...
The sedimentary sequence recovered from the Voka outcrops,northeastern Estonia:implications for late Pleistocene stratigraphy
last ice age chrono and palynostratigraphy northeastern Estonia Voka site
2009/10/21
New palaeoenvironmental and geological data, which may be integrated with the results from the neighbouring regions,were collected from two well-exposed continuous outcrops in the vicinity of Voka vil...
Recent developments in the Upper Ordovician and lower Silurian conodont biostratigraphy in Estonia
conodonts biostratigraphy Upper Ordovician Llandovery Wenlock Estonia
2009/10/21
The current state of and the latest developments in the conodont-based biostratigraphical studies of Upper Ordovician and lower Silurian strata in Estonia are discussed. An updated conodont zonation i...
Hulterstad brachiopods and associated faunas in the Vormsi Stage (Upper Ordovician,Katian) of the Lelle core,Central Estonia
Hulterstad brachiopods chitinozoans scolecodonts Vormsi Stage Ordovician Estonia
2009/10/21
Integrated palaeontological and sedimentological study of the Upper Ordovician Vormsi Stage in the Lelle drill core section, Central Estonia, revealed an association of shelly fauna containing the end...
Sedimentary record of heavy metals in Lake Rõuge Liinjärv,southern Estonia
heavy metals 210Pb dating sediments Lake Rõ uge Liinjä rv
2009/10/21
Anthropogenic impact on Lake Liinjärv (Rõuge, southern Estonia) was studied back to the mid-19th century on the basis of heavy metals (Pb, Cu, Zn, Mn, and Hg) and geochemical parameters of...