Results 51 to 60 of about 14,612,070 (286)

Structure and formation of ice-ground veins of the second lake-alluvial terrace in the North of Gydan in the late Neopleistocene–Holocene

Лëд и снег, 2019
The syngenetic ice and ice-ground composite veins in khasyrey (alas) and interalas plateaus were studied on the second lake-alluvial terrace located in the North of the Gydan Peninsula near the village of Gyda. On the basis of the radiocarbon dating, the
Ya. V. Tikhonravova, A. V. Lupachev, E. A. Slagoda, V. V. Rogov, A. O. Kuznetsova, V. I. Butakov, G. V. Simonova, N. A. Taratunina, D. R. Mullanurov   +8 more
doaj   +1 more source

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

, 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

High-precision radiocarbon dating of the construction phase of Oakbank Crannog, Loch Tay, Perthshire [PDF]

, 2010
Many of the Loch Tay crannogs were built in the Early Iron Age and so calibration of the radiocarbon ages produces very broad calendar age ranges due to the well-documented Hallstatt plateau in the calibration curve. However, the large oak timbers that
Cook, G. T., Dixon, T.N., Xu, S., Andrian, B., Naysmith, P., Cook, G., Russell, N., Dixon, T. N.   +7 more
core   +1 more source

Bayesian evaluation of the southern hemisphere radiocarbon offset during the holocene [PDF]

, 2009
While an interhemispheric offset in atmospheric radiocarbon levels from AD 1950–950 is now well established, its existence earlier in the Holocene is less clear, with some studies reporting globally uniform 14C levels while others finding Southern ...
Turney, Chris S.M., Palmer, Jonathan G., Ramsey, Christopher Bronk, Turney, Chris, Hogg, Alan, Hogg, Alan G., Palmer, Jonathan, Bronk Ramsey, Christopher, Turney, Chris; id_orcid   +8 more
core   +1 more source

Radiocarbon Reveals Modern Carbon Exchange With Topsoil Inorganic Carbon in Drylands. [PDF]

Glob Chang Biol
Radiocarbon measurements across drylands reveal that topsoil inorganic carbon carries a measurable modern carbon signature linked to soil pH and organic carbon pools. This modern imprint weakens with increasing aridity and soil depth, indicating reduced exchange with contemporary carbon sources under drier conditions and in deeper soils.
Wang H, Huang J, Maestre FT, Zhao G, Lu N, Wang C, Chen W, Bramble SE, Schrumpf M, Dippold MA, Zhang Y, Zaehle S, Fu B, Trumbore S.   +13 more
europepmc   +2 more sources

Use of three isotopes to calibrate human bone radiocarbon determinations from Kainapirina (SAC), Watom Island, Papua New Guinea [PDF]

, 2005
In archaeological dating, the greatest confidence is usually placed upon radiocarbon results of material that can be directly related to a defined archaeological event.
Green, Roger, Petchey, Fiona
core   +1 more source

Origin, evolution and biogeographic dynamics of the European rabbit (Oryctolagus cuniculus) in Southwestern Europe

The Anatomical Record, EarlyView.
Abstract The Pleistocene is a key period for understanding the evolutionary history and palaeobiogeography of the European rabbit (Oryctolagus cuniculus). The species was first documented in southeastern Iberia at the beginning of the Middle Pleistocene and appears to have rapidly spread throughout Southwestern Europe, where it was found in numerous ...
Maxime Pelletier
wiley   +1 more source

Unearthing Forest History: Integrating Soil Charcoal Macrofossils and Pollen Reveals Delayed Forest Responses to Holocene Climatic Transitions in Boreal-Temperate Ecotone. [PDF]

Ecol Evol
This study reconstructs long‐term vegetation dynamics at the boreal–temperate forest ecotone in eastern Canada using soil charcoal, pollen records, and forest inventories. Results reveal a delayed expansion of thermophilous tree species and a late borealization of the landscape in relation to climate change, alongside recent stand‐scale shifts driven ...
Rioux-Couture C, Grondin P, de Lafontaine G.   +2 more
europepmc   +2 more sources

Cortical bone distribution in the human mandibular symphysis: Ontogenic and morphometric approaches in archeological context

The Anatomical Record, EarlyView.
Abstract The human mandibular symphysis concentrates multiaxial loads during function and remodels throughout growth, but the precise mechanisms underlying cortical bone shape during growth remain relatively unexplored. Approaches based solely on thickness or external cortical contours provide only partial insights and do not capture the functional ...
Ana Ribeiro, Elsa Garot, Christine Couture, Pierre‐Hadrien Decaup   +3 more
wiley   +1 more source

RADIOCARBON DATING OF A VERY LARGE AFRICAN BAOBAB FROM LIMPOPO, SOUTH AFRICA: INVESTIGATION OF THE SAGOLE BIG TREE

Studia Universitatis Babes-Bolyai Chemia, 2017
The article reports the AMS (accelerator mass spectrometry) radiocarbon dating results of Sagole Big tree, a giant African baobab from Limpopo, South Africa. Several wood samples were collected from the walls of its inner cavity and dated by radiocarbon.
Adrian PATRUT, Roxana T. PATRUT, Robert PELT, van , Daniel A. LOWY, Edit FORIZS, Jenő BODIS, Dragos MARGINEANU, Karl F. REDEN, von   +7 more
doaj   +1 more source