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Now showing items 1-20 of 234
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(2006)The 230Th/234U ages of fossil mollusk shells collected from the Sinyangri and Hamori Formations, the youngest stratigraphic units on Jeju Island, Korea, were estimated using multiple collectors inductively coupled plasma ...
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234U 238U MASS SPECTROMETRY OF CORALS: HOW ACCURATE IS THE UTH AGE OF THE LAST INTERGLACIAL PERIOD? (1991)Direct measurement of U and Th by mass spectrometry recently provided a spectacular improvement in the precision of coral dating by the UTh disequilibrium method [1]. Mass spectrometric data also provide a much better ...
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(2006)The purpose of our work is to refine the age of the Holocene polygonal ice wedge complex in Terrace 1 of the Chara River, plot an isotope diagram, which allows one to reconstruct winter temperatures of the period of ice-wedge ...
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(2001)A sediment core taken from the Sea of Okhotsk, which is located in the western North Pacific rim with an extensive seasonal sea-ice cover, was investigated for lipid class compounds, total organic carbon, total nitrogen, ...
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(2003)A Cenozoic multi-species record of benthic foraminiferal calcite Sr/Ca has been produced and is corrected for inter-specific offsets (typically less than 0.3 mmol/mol) and for the linear relationship between decreasing ...
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(2006)Meteoric smoke particles (MSPs) form through the vaporization of meteoroids and the subsequent re-condensation of metallic species in the mesosphere. Recently, iridium and platinum enrichments have been identified in ...
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(2004)Sediment core ASV-987 from Russkaya Gavan’, a tidewater fjord on the northwestern coast of Novaya Zemlya, provides the first multicentury record of sedimentary and hydrographic glaciomarine environments in Russian Arctic ...
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(1999)During the last 12 thousand years the Udokan volcan oes erupted alkaline basalts and trachites. The strike of the fissure magma channels changed fr om NW to NE during the Middle Holocene in the interval of 7.9-4.6 thousand ...
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(1996)The catastrophic explosive eruptions at Khangar ~7000 14C years ago, Khodutka Maar ~2800 14C years ago, and Baraniy Amfiteatr ~1500 14C years ago are classified as a particular type of subcaldera eruptions. Although they ...
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(2006)Both local and regional controls on slope sedimentation west of Porcupine Bank are assessed using an array of 25 gravity cores, integrated with shallow seismic, TOBI side-scan and high-resolution bathymetry data. The cores ...
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(2002)We present a new assessment of the pre-anthropogenic U budget for the Holocene ocean. We find that the gross input of U to the ocean lies in the range 53±17 Mmol/year, where the dominant source is river runoff (42.0±14.5 ...
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(2006)Holocene reconstructions of relative sea-level (RSL) and environmental change in the coastal zone have become progressively more numerous since the importance of assessing possible future sea-level rises has become apparent. ...
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(1996)The abundance and isotopic composition of total and pyrite sulphur have been determined in a core in the central Black Sea. Pyrite varies in concentration from roughly 2 wt% in the sapropel (Unit 2), to 0.8 wt% in the ...
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(2006)Sediment cores retrieved in the Benguela coastal upwelling system off Namibia show very distinct enrichments of solid phase barium at the sulfate/methane transition (SMT). These barium peaks represent diagenetic barite ...
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ACTIVE VOLCANOES OF KAMCHATKA: SPATIAL AND TEMPORAL DYNAMICS OF ERUPTIVE INTENSITY AND PRODUCTIVITY (2000)The total volumes of volcanic rocks and average annual productivities of active volcanoes were calculated for all volcanic zones of Kamchatka for the mid-Pleistocene, Late Pleistocene, and Holocene epochs. Average values ...
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AGES OF CALDERAS, LARGE EXPLOSIVE CRATERS AND ACTIVE VOLCANOES IN THE KURIL-KAMCHATKA REGION, RUSSIA (1995)The ages of most of calderas, large explosive craters and active volcanoes in the Kuril-Kamchatka region have been determined by extensive geological, geomorphological, tephrochronological and isotopic geochronological ...
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(2001)Tanypodinae usually form an important component in subfossil Chironomidae assemblages but can be difficult to identify beyond subfamily level due to fragmentation of subfossil material. However, generic identification of ...
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(2002)Although shelf-edge deltas are well-imaged seismic features of Holocene and Pleistocene shelf margins, documented outcrop analogues of these important sand-prone reservoirs are rare. The facies and stratigraphic architecture ...
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(2004)New data have been obtained for the ancient, previously unknown large earthquakes that occurred during the Holocene in the central Caucasus region in the vicinity of Elbrus Volcano. The radiocarbon datings of the paleoseismic ...
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(2001)Holocene glacial deposits were dated using tephrochronoly and lichenometry in 17 cirques in the upper reaches of the Topolovaya, Olkhovaya, Vaktan Malkinsky, and Srednyaya Avacha Rivers in Kamchatka. All of the glaciers ...
Now showing items 1-20 of 234