{"title":"НОВЫЕ ОПРЕДЕЛЕНИЯ ТЕПЛОВОГО ПОТОКА В ПРЕДЕЛАХ ТЕПЛОВОЙ АНОМАЛИИ БАЛТИЙСКОЙ СИНЕКЛИЗЫ","authors":"G. Urban","doi":"10.3176/geol.1991.1.04","DOIUrl":"https://doi.org/10.3176/geol.1991.1.04","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123109235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Conodont faunas from the kukersites and kukersitic limestones of the Kivioli Member are similar to coeval collections from other sedimentary facies and there are no taxa endemic to this unusual environment. The presence of Amorphognathus tvaerensis and the absence of Pygodus anserinus suggest that the lower part of the Kukruse Stage is referable to the A. tvaerensis conodont Biozone and that the base of the Upper Ordovician lies at or beneath the base of the Kukruse Stage.
{"title":"Conodonts of the Kiviõli Member, Viivikonna Formation (Upper Ordovician) in the Kohtla section, Estonia","authors":"V. Viira, R. Aldridge, Stephanie Curtis","doi":"10.3176/geol.2006.3.02","DOIUrl":"https://doi.org/10.3176/geol.2006.3.02","url":null,"abstract":"Conodont faunas from the kukersites and kukersitic limestones of the Kivioli Member are similar to coeval collections from other sedimentary facies and there are no taxa endemic to this unusual environment. The presence of Amorphognathus tvaerensis and the absence of Pygodus anserinus suggest that the lower part of the Kukruse Stage is referable to the A. tvaerensis conodont Biozone and that the base of the Upper Ordovician lies at or beneath the base of the Kukruse Stage.","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"23 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120993128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"ФРАГМЕНТ СИХОТЭ-АЛИНСКОГО МЕТЕОРИТНОГО ДОЖДЯ В КОЛЛЕКЦИИ ИНСТИТУТА ГЕОЛОГИИ АКАДЕМИИ НАУК ЭСТОНИИ","authors":"E. Pirrus, R. Tiirmaa","doi":"10.3176/geol.1990.4.04","DOIUrl":"https://doi.org/10.3176/geol.1990.4.04","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127496228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"THE PITKASOO BOG – AN ANCYLUS LAGOON FROM SAAREMAA ISLAND, ESTONIA","authors":"Lars-König Königsson, G. Possnert, L. Saarse","doi":"10.3176/geol.1998.2.03","DOIUrl":"https://doi.org/10.3176/geol.1998.2.03","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124953450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
. Various methods have been used to determine the age of the Kaali craters. Most of contemporary investigators believe the age of the craters to be some 4000 years. Studies of microtektites in the Piila mire close to Kaali have concluded that the craters were formed some 7500 years ago.
{"title":"ON THE AGE OF THE METEORITE CRATERS AT KAALI (SAAREMAA ISLAND, ESTONIA)","authors":"A. Raukas, R. Pirrus, Raivo Rajamäe, R. Tiirmaa","doi":"10.3176/geol.1995.3.03","DOIUrl":"https://doi.org/10.3176/geol.1995.3.03","url":null,"abstract":". Various methods have been used to determine the age of the Kaali craters. Most of contemporary investigators believe the age of the craters to be some 4000 years. Studies of microtektites in the Piila mire close to Kaali have concluded that the craters were formed some 7500 years ago.","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"14 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126116673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"TAXONOMY OF THE CONODONT SPECIES OZARKODINA POLINCLINATA (NICOLL ET REXROAD) IN THE SILURIAN OF ESTONIA","authors":"P. Männik","doi":"10.3176/geol.1992.2.02","DOIUrl":"https://doi.org/10.3176/geol.1992.2.02","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123433275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
. The succession of chitinozoan taxa in the uppermost Llandovery and lowermost Wenlock of the Viki, Ohesaare, Kaugatuma, and Ruhnu drill core sections is described and correlated with the global stratotype section of the basal Wenlock in Hughley Brook, Shropshire, England. The most important biomarkers for the identification of the Llandovery(cid:150)Wenlock boundary in Estonian sections are the disappearance levels of Ramochitina nestorae , Conochitina acuminata , C . cf. flamma , and Angochitina longicollis . In the West Estonian cores this boundary corresponds to a level in the middle or upper part of the Margachitina margaritana Biozone. In the Viki and Ohesaare cores it coincides with the bentonite layers above the accepted boundary between the Adavere and Jaani regional stages and correlates with a level in the middle of the murchisoni graptolite Biozone. Three new species, Belonechitina oeselensis , Ancyrochitina mullinsi , and Eisenackitina inanulifera , are described.
{"title":"Chitinozoans of the Margachitina margaritana Biozone and the Llandovery–Wenlock boundary in West Estonian drill cores","authors":"V. Nestor","doi":"10.3176/geol.2005.2.02","DOIUrl":"https://doi.org/10.3176/geol.2005.2.02","url":null,"abstract":". The succession of chitinozoan taxa in the uppermost Llandovery and lowermost Wenlock of the Viki, Ohesaare, Kaugatuma, and Ruhnu drill core sections is described and correlated with the global stratotype section of the basal Wenlock in Hughley Brook, Shropshire, England. The most important biomarkers for the identification of the Llandovery(cid:150)Wenlock boundary in Estonian sections are the disappearance levels of Ramochitina nestorae , Conochitina acuminata , C . cf. flamma , and Angochitina longicollis . In the West Estonian cores this boundary corresponds to a level in the middle or upper part of the Margachitina margaritana Biozone. In the Viki and Ohesaare cores it coincides with the bentonite layers above the accepted boundary between the Adavere and Jaani regional stages and correlates with a level in the middle of the murchisoni graptolite Biozone. Three new species, Belonechitina oeselensis , Ancyrochitina mullinsi , and Eisenackitina inanulifera , are described.","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122113237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ivar Jaek, Galina Hütt, Ilmar Rammo, V. Vasilchenko
Carbonates of different origin, such as Iceland spar, calcites, and mollusc shells, used as electron spin resonance and thermoluminescence palaeodosimeters, were studied in order to determine their suitability for optically stimulated luminescence dating. The stimulation/excitation spectra of the afterglow of the samples were recorded in the wavelength range of 250 -1100 nm. The results of the study show that these spectra present either excitation spectra of Mn 2+ ion fluorescence (samples of calcites and Iceland spar, red emission recorded) or the excitation spectra of primary phosphorescence (samples of carbonates, including mollusc shells; short-wave emission bands recorded). The recorded stimulation spectra revealed no spectral bands sensitive to stimulation by ionizing radiation, which would disappear as a result of heating and could thus be related to deep traps in carbonates, needed in dating. The causes of this situation which is unusual in luminescent crystals, including luminescence (palaeo)dosimeters, and the ways of overcoming the difficulties in optical dating of natural carbonates are discussed.
{"title":"SEARCH FOR THE DOSE-SENSITIVE OPTICALLY STIMULATED LUMINESCENCE RESPONSE IN NATURAL CARBONATES","authors":"Ivar Jaek, Galina Hütt, Ilmar Rammo, V. Vasilchenko","doi":"10.3176/geol.2001.3.01","DOIUrl":"https://doi.org/10.3176/geol.2001.3.01","url":null,"abstract":"Carbonates of different origin, such as Iceland spar, calcites, and mollusc shells, used as electron spin resonance and thermoluminescence palaeodosimeters, were studied in order to determine their suitability for optically stimulated luminescence dating. The stimulation/excitation spectra of the afterglow of the samples were recorded in the wavelength range of 250 -1100 nm. The results of the study show that these spectra present either excitation spectra of Mn 2+ ion fluorescence (samples of calcites and Iceland spar, red emission recorded) or the excitation spectra of primary phosphorescence (samples of carbonates, including mollusc shells; short-wave emission bands recorded). The recorded stimulation spectra revealed no spectral bands sensitive to stimulation by ionizing radiation, which would disappear as a result of heating and could thus be related to deep traps in carbonates, needed in dating. The causes of this situation which is unusual in luminescent crystals, including luminescence (palaeo)dosimeters, and the ways of overcoming the difficulties in optical dating of natural carbonates are discussed.","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129610706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"CHITINCZOAN DIVERSITY DYNAMICS IN THE EAST BALTIC SILURIAN","authors":"V. Nestor","doi":"10.3176/geol.1992.4.06","DOIUrl":"https://doi.org/10.3176/geol.1992.4.06","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129728744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Karl MÜÜRISEPP 01. 08. 1907-28. 02. 1996; pp. 173","authors":"E. Pirrus","doi":"10.3176/geol.1996.3.05","DOIUrl":"https://doi.org/10.3176/geol.1996.3.05","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129938990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：