Results 81 to 90 of about 5,424,467 (257)

Validity of radiocarbon ages of Siberian yedoma

open access: yesGeoResJ, 2017
Abstract The ice wedges are considered as key subjects for 14C aging of yedoma, as there are no any exchange processes between the environment and the ice wedges. Syngenetic sediments contain allochthonous organic admixtures which originated at a distance from its present position.
Yurij K. Vasil'chuk, Alla C. Vasil'chuk
openaire   +1 more source

Introducing a ramped pyrolysis/oxidation‐14CO2 analysis system operated with mobile molecular sieve traps

open access: yesLimnology and Oceanography: Methods, EarlyView.
Abstract A novel instrument for the thermal degradation of sedimentary organic matter was set up at the Alfred Wegener Institute (AWI) in Bremerhaven, Germany, with the aim of enabling Ramped Pyrolysis/Oxidation‐14C analysis as direct CO2 gas measurement.
Laura Kattein   +4 more
wiley   +1 more source

Inland Ertebølle Culture: the importance of aquatic resources and the freshwater reservoir effect in radiocarbon dates from pottery food crusts

open access: yesInternet Archaeology, 2014
The Ertebølle culture is a late Mesolithic hunter-gatherer-fisher culture in southern Scandinavia, northern Germany and Poland. Archaeological finds as well as scientific analyses of humans and their artefacts indicate the great importance of aquatic ...
Bente Philippsen, John Meadows
doaj   +1 more source

Body Size, Dental Pathology, and Maternal Genetic Diversity of Ancient Horses in the Eastern Baltic Sea Region and Western Russia

open access: yesInternational Journal of Osteoarchaeology, EarlyView.
ABSTRACT The early evolutionary history of modern domestic horses (Equus caballus/Equus ferus caballus), known as the DOM2 lineage, is well documented due to numerous archaeological and ancient DNA (aDNA) studies. Although many uncertainties remain in the domestication timeline, current evidence suggests that the domestication of modern horses began in
Johanna Honka   +14 more
wiley   +1 more source

Lamont Radiocarbon Measurements VI

open access: yes, 1959
In contrast to previous radiocarbon measurement lists, this list contains only known-age samples, most of which formed during the past ten years. The measurements were made largely in order to gain an understanding of the distribution of radiocarbon ...
Broecker, Wallace S., Olson, Edwin A.
core   +1 more source

Methodological approaches to determining the marine radiocarbon reservoir effect [PDF]

open access: yes, 2005
The marine radiocarbon reservoir effect is an offset in 14C age between contemporaneous organisms from the terrestrial environment and organisms that derive their carbon from the marine environment.
Dugmore, A., Cook, G.T., Ascough, P.L.
core   +1 more source

Needle in a haystack: Holocene history of European larch in Central Europe revisited

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Defining nativity of species is crucial for their management. However, this is a complex task, especially for species that have been used and spread by humans for a long time. We combined paleoecological records with extensive genetic data to investigate the Holocene history of European larch—a common and economically important tree species in Central ...
Martin Prach   +11 more
wiley   +1 more source

RADIOCARBON DATING OF THE HISTORIC LIVINGSTONE TREE AT CHIRAMBA, MOZAMBIQUE

open access: yesStudia Universitatis Babes-Bolyai Chemia, 2020
The article reports the AMS (accelerator mass spectrometry) radiocarbon dating results of the Livingstone Tree, a large African baobab on the right bank of the Zambezi, near Chiramba, Mozambique.
Adrian PATRUT   +5 more
doaj   +1 more source

A reappraisal of the Middle to Later Stone Age prehistory of Morocco Réévaluer la préhistoire du Maroc, du Middle Stone Age au Later Stone Age

open access: yesJournal of the Royal Anthropological Institute, EarlyView.
Over the last 25 years, perceptions of the early prehistory of Northwest Africa have undergone radical changes due to new fieldwork projects and a corresponding growth in scientific interest in the region. Much of this work has been focused in Morocco, known for its extremely rich fossil and archaeological records in caves and rock shelters.
Nick Barton   +3 more
wiley   +1 more source

NERC Radiocarbon Age Measurements Determined by Radiometric Counting 1996-2005

open access: yes, 2010
We describe a new compilation of radiocarbon age measurements performed by the NERC Radiocarbon Laboratory that is freely available to access over the World Wide Web.
Garnett, M H   +4 more
core  

Home - About - Disclaimer - Privacy