Results 71 to 80 of about 2,119 (182)

Fitting the last Pleistocene δ18O and CO2 time series with simple box models

open access: yesScientia Marina, 2012
Based on the model of Paillard and Parrenin (2004), several box models that incorporate simple parameterizations of the oceanic CO2 pump were developed.
Antonio García-Olivares, Carmen Herrero
doaj   +1 more source

Orta Anadolu’daki Kılçak formasyonunun (Erken Miyosen) palinolojisi: Paleoiklimsel ve paleo-ortamsal çıkarımlar

open access: yesBulletin of the Mineral Research and Exploration, 2018
Paleovejetasyonun yeniden kurulması amacıyla, erken Miyosen yaşlı Kılçak formasyonu (Orta Anadolu, Türkiye) çökellerinin palinolojik incelemesi gerçekleştirilmiştir.
Nurdan YAVUZ, Şükrü Sinan DEMİRER
doaj   +1 more source

The stable isotope setting of Australopithecus sediba at Malapa, South Africa

open access: yesSouth African Journal of Science, 2016
We report δ13C and δ18O results from carbonate-cemented cave sediments at Malapa in South Africa. The sediments were deposited during a short-period magnetic reversal at 1.977±0.003 Ma, immediately preceding deposition of Facies D sediments that contain ...
Emily Holt   +3 more
doaj   +1 more source

The Aral Sea: a palaeoclimate archive

open access: yes, 2006
La Mer intracontinentale endoréique de l'Aral, éloignée de toute influence océanique, constitue en Asie Centrale une excellente archive sédimentaire pour des études paléoclimatiques à haute résolution. Nous avons effectué une analyse palynologique, sédimentologique et géochimique sur des carottages sédimentaires effectués dans la Baie de Chernyshov ...
openaire   +3 more sources

Paleoclimate, paleoenvironment and source rock development model of Eocene in Shunde Sag, Pearl River Mouth Basin, China

open access: yesPetroleum Exploration and Development
Based on the comprehensive analysis of data from petrology and mineralogy, well logging, seismic surveys, paleontology, and geochemistry, a detailed research was conducted on paleoenvironmental and paleoclimatic conditions, and modeling of the source ...
Jianxiang PEI   +3 more
doaj   +1 more source

Evaporite karst in Italy: a review

open access: yesInternational Journal of Speleology, 2017
Although outcropping rarely in Italy, evaporite (gypsum and anhydrite) karst has been described in detail since the early 20th century. Gypsum caves are now known from almost all Italian regions, but are mainly localised along the northern border of the ...
Jo De Waele   +15 more
doaj   +1 more source

Late Pleistocene Low-Altitude Atlantic Palaeoglaciation and Palaeo-ELA Modelling: Insights from Serra da Cabreira, NW Iberia

open access: yesQuaternary
Low-altitude palaeoglaciation in Atlantic mountain regions provides important insights into past climatic conditions and moisture dynamics during the Last Glacial Cycle. This study presents the first quantitative reconstruction of palaeoglaciers in Serra
Edgar Figueira   +2 more
doaj   +1 more source

The archaeology of glaciers and ice patches: The intersection of climate change, glacier retreat and cultural heritage

open access: yesAnnals of Glaciology
The archaeology of glaciers and ice patches has developed as a distinct new field in response to climate change and the melting of mountain ice. Thousands of artefacts and biological materials, dating back up to 10 000 years are being released from ...
Lars Holger Pilø
doaj   +1 more source

Methods for determining peat humification and for quantifying peat bulk density, organic matter and carbon content for palaeostudies of climate and peatland carbon dynamics [PDF]

open access: yesMires and Peat, 2011
Quantitative palaeostudies of climate change and carbon dynamics are reliant on precise and accurate laboratory measurements. Here we present laboratory protocols for the colorimetric determination of peat humification and for bulk density and organic ...
F.M. Chambers, D.W. Beilman, Z. Yu
doaj  

Procedures for extraction and purification of leaf wax biomarkers from peats [PDF]

open access: yesMires and Peat, 2011
Palaeoecological and palaeoclimate reconstruction, using leaf wax biomarkers, is a relatively new sub-discipline of peatland science. The ability to process large numbers of samples rapidly for biomarkers makes this type of analysis particularly ...
J.E. Nichols
doaj  

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