Геология России: Recent submissions

Now showing items 641-660 of 43490

BOVID PALEOECOLOGY AND PALEOENVIRONMENTS FROM THE LATE MIOCENE OF BULGARIA: EVIDENCE FROM DENTAL MICROWEAR AND STABLE ISOTOPES

Merceron G.; Zazzo A.; Spassov N.; Geraads D.; Kovachev D. (2006)

A multi proxy approach was performed to characterize vegetation in southwestern Bulgaria during the end of the Early and the Middle Turolian (8.7–7.0 Ma). This period was marked by eustatic fluctuations in the Mediterranean ...
DECELERATING PRECURSORY SEISMICITY IN VRANCEA

Scordilis E.M. (2006)

Preshock seismic excitation followed by seismic quiescence has been observed in the seismogenic region of strong shallow mainshocks. The strain released by such preshocks is decelerating with the time to the mainshock and ...
U-PB GEOCHRONOLOGY OF SPELEOTHEMS BY MC-ICPMS

Woodhead J.; Hellstrom J.; Maas R.; Drysdale R.; Zanchetta G.; Devine P.; Taylor E. (2006)

Building upon the work of Richards et al. [1998. U-Pb dating of a speleothem of Quaternary age. Geochimica et Cosmochimica Acta 62, 3683-3688], we have developed a method for precise dating of speleothems beyond the range ...
PLEISTOCENE PALEOENVIRONMENTAL EVOLUTION AT CONTINENTAL MIDDLE LATITUDE INFERRED FROM CARBON AND OXYGEN STABLE ISOTOPE ANALYSIS OF OSTRACODES FROM THE GUADIX-BAZA BASIN (GRANADA, SE SPAIN)

Ortiz J.E.; Torres T.; Llamas J.F.; Delgado A.; Reyes E.; Raya J.; Soler V. (2006)

A representative paleoenvironmental reconstruction of continental middle latitude from ca. 2 my to the upper part of Middle Pleistocene (279 ± 77 ky) was obtained from the carbon and oxygen stable isotopes analyzed in ...
COLOMBIAN DRY MOIST FOREST TRANSITIONS IN THE LLANOS ORIENTALES-A COMPARISON OF MODEL AND POLLEN-BASED BIOME RECONSTRUCTIONS

Marchant R.; Berrío J.C.; Boom A.; Behling H.; Hooghiemstra H. (2006)

Colombian vegetation, at the ecological level of the biome, is reconstructed at six sites using pollen data assigned a priori to plant functional types and biomes. The chosen sites incorporate four savanna sites (Laguna ...
METHANE DYNAMICS IN A MICROBIAL COMMUNITY OF THE BLACK SEA TRACED BY STABLE CARBON ISOTOPES IN VITRO

Seifert R.; Blumenberg M.; Michaelis W.; Nauhaus K.; Krüger M. (2006)

Microbial mats thriving at gas seeps within anoxic bottom water were sampled during a Black Sea expedition in summer 2001. These mats contain associations of archaea which belong to the ANME-1 and, to a lesser extent, to ...
EAST ASIAN SUMMER MONSOON VARIABILITY DURING MARINE ISOTOPE STAGE 5 BASED ON SPELEOTHEM δ18O RECORDS FROM WANXIANG CAVE, CENTRAL CHINA

Johnson K.R.; Lynn Ingram B.; Sharp W.D.; Zhang P. (2006)

Speleothems from Wanxiang Cave, China (33°19′ N, 105°00′ E), located near the northern limit of the East Asian summer monsoon, provide high-resolution records of paleomonsoon variability. We present a simple model for ...
WINTER-SPRING PRECIPITATION AS THE PRINCIPAL CONTROL ON PREDOMINANCE OF C3 PLANTS IN CENTRAL ASIA OVER THE PAST 1.77 MYR: EVIDENCE FROM δ13C OF LOESS ORGANIC MATTER IN TAJIKISTAN

Yang S.; Ding Z. (2006)

Although changes in atmospheric CO2 levels are thought to be the major factor driving long-term C3/C4 vegetation evolution, recent studies tend to emphasize the effect of regional climate conditions on C3/C4 variations. ...
CLIMATIC AND ENVIRONMENTAL CONTROLS ON THE VARIATION OF C3 AND C4 PLANT ABUNDANCES IN CENTRAL FLORIDA FOR THE PAST 62,000 YEARS

Huang Y.; Shuman B.; Wang Y.; Webb III T.; Grimm E.C.; Jacobson G.L. (2006)

Lake Tulane provides one of the few continental sediment records beyond the late glacial period (~ 15,000 cal years B.P.) for eastern North America. Its continuous, organic-rich sediment has yielded pollen assemblages that ...
A LONG-BODIED LIZARD FROM THE LOWER CRETACEOUS OF JAPAN

Evans S.E.; Manabe M.; Noro M.; Isaji S.; Yamaguchi M. (2006)

Platynotan lizards underwent a dramatic Late Cretaceous radiation into marine habitats. Beginning with small-bodied forms, the lineage culminated with the mosasaurs, large predatory lizards with a world-wide distribution ...
COMPARATIVE MOLECULAR BIOMARKER ASSESSMENT OF PHYTOPLANKTON PALEOPRODUCTIVITY FOR THE LAST 160 KYR OFF CAP BLANC, NW AFRICA

Zhao M.; Mercer J.L.; Eglinton G.; Higginson M.J.; Huang C.-Y. (2006)

We report high resolution molecular abundance data for alkenones, dinosterol, long chain diols and n-alkanols from ODP Site 658 (20°45′N, 18°35′W; 2263 m water depth). These data are compared with previously reported data ...
LATE PALEOPROTEROZOIC EXTENSION AND A PALEOSTRESS FIELD RECONSTRUCTION OF THE NORTH CHINA CRATON

Hou G.; Wang C.; Li J.; Qian X. (2006)

Mafic dyke swarms and aulacogens are major anorogenic extensional events in the Late Paleoproterozoic North China Craton (NCC). The N-NNW mafic dyke swarms are widespread in the NCC, whose ages span between 1.83 and 1.77 ...
THE SYMMETRY AND CRYSTAL STRUCTURE OF GORCEIXITE, BAAL3[PO3(O,OH)]2(OH)6, A MEMBER OF THE ALUNITE SUPERGROUP

Dzikowski T.J.; Groat L.A.; Jambor J.L. (2006)

The crystal structure of the Ba-Al phosphate mineral gorceixite, a 7.0538(3), c 17.2746(6) Å, V 744.4(2) Å3, space group R3 ̄m, Z = 3, has been refined to an R1, index of 2.3% on the basis of 253 unique reflections measured ...
THE OXIDATION STATE OF EUROPIUM IN HYDROTHERMAL SCHEELITE: IN SITU MEASUREMENT BY XANES SPECTROSCOPY

Brugger J.; Jones H.; Etschmann B.; Chu Y.S.; Vogt S.; Harland C.; Ryan C. (2006)

X-ray microfluorescence and EuL3 micro-X-ray absorption near-edge structure (XANES) spectroscopy were conducted to determine the distribution and valence state of europium in two samples of scheelite (CaWO4) containing ...
LATE HOLOCENE CLIMATE CHANGE AND HUMAN IMPACT RECORDED IN A SOUTH SWEDISH OMBROTROPHIC PEAT BOG

van der Linden M.; van Geel B. (2006)

A peat core from a raised bog in southern Sweden was examined (plant macrofossils, pollen/non-pollen microfossils, colorimetric humification, carbon/nitrogen ratios, bulk densities, loss on ignition) to investigate the ...
THE EARLIEST ENCRINURID TRILOBITES FROM THE EAST BALTIC AND THEIR TAXONOMIC INTEREST

Pärnaste H. (2006)

The earliest known representative of the subfamily Encrinurinae, Encrinuroides regularis sp. nov., is described from the glauconitic sandstone of the Máekúla Member, Billingen Stage (Arenig), from localities in the ...
LATE ORDOVICIAN BRACHIOPODS FROM THE DULANKARA FORMATION OF THE CHU-ILI RANGE, KAZAKHSTAN: THEIR SYSTEMATICS, PALAEOECOLOGY AND PALAEOBIOGEOGRAPHY

Popov L.E.; Cocks L.R.M. (2006)

Brachiopods from the late Ordovician (late Caradoc) Dulankara Formation of the Chu-Ili Range, Kazakhstan, are reviewed. Those from the upper two members of the formation, the Degeres and Akkol members, are systematically ...
MILLENNIAL-SCALE CLIMATIC CYCLES IN THE EARLY PLIOCENE POLLEN RECORD OF PTOLEMAIS, NORTHERN GREECE

Kloosterboer-Van Hoeve M.L.; Visscher H.; Brinkhuis H.; Steenbrink J. (2006)

Early Pliocene lacustrine sediments from the Ptolemais Basin, northern Greece, exhibit a climatically induced cyclicity, which can be correlated with the orbital cycle of precession. Superimposed on precession-controlled ...
TEMPERATURE RESPONSES TO QUASI-100-YR SOLAR VARIABILITY DURING THE PAST 6000 YEARS BASED ON δ18O OF PEAT CELLULOSE IN HONGYUAN, EASTERN QINGHAI-TIBET PLATEAU, CHINA

Xu H.; Hong Y.; Lin Q.; Zhu Y.; Hong B.; Jiang H. (2006)

During the past 6000 years, the temperature variation trend inferred from δ18O of peat cellulose in a peat core from Hongyuan (eastern Qinghai-Tibet plateau, southwestern China) is similar to the atmospheric 14C concentration ...
SEDIMENTOLOGY OF A MUDDY ALLUVIAL DEPOSIT: TRIASSIC DENWA FORMATION, INDIA

Ghosh P.; Sarkar S.; Maulik P. (2006)

Triassic Upper Denwa Formation (~ 380 m) in the Satpura Gondwana basin, central India is a mudstone-dominated fluvial succession that comprises isolated ribbon-shaped (2-5-m-thick) channel-fill bodies encased within ...

Now showing items 641-660 of 43490

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