Results 51 to 60 of about 1,592,873 (364)

Dating old hollow trees by applying a multistep tree-ring and radiocarbon procedure to trunk and exposed roots

MethodsX, 2018
In the process of dating the oldest trees, which are often hollow, we developed a new method that combines tree-ring cross dating and wiggle matching radiocarbon techniques on wood samples extracted from the stem and from exposed roots. The method can be
Gianluca Piovesan, Franco Biondi, Michele Baliva, Lucio Calcagnile, Gianluca Quarta, Alfredo Di Filippo   +5 more
doaj   +1 more source

The chronostratigraphy of Late Pleistocene glacial and periglacial aeolian activity in the Tuktoyaktuk Coastlands, NWT, Canada [PDF]

, 2006
Aeolian periglacial sand deposits are common in the Tuktoyaktuk Coastlands of Western Arctic Canada. Regionally extensive and thick aeolian sand-sheet deposits have been observed in two major stratigraphic settings: within a sand unit characterized by ...
Ager, Anderson, Andrews, Bateman, Bateman, Berger, Berger, Berger, Burn, Bégin, Carter, Dallimore, Dijkmans, Dinter, Duk-Rodkin, Duk-Rodkin, Dyke, Dyke, Edwards, Fairbanks, Fryberger, Grootes, Hamilton, Hopkins, Julian B. Murton, Kocurek, Kocurek, Koster, Lambeck, Lea, Lea, Lemmen, MacDonald, Mackay, Mackay, Mark D. Bateman, Martinson, McKee, Mejdal, Michaud, Murray, Murton, Murton, Murton, Murton, Murton, Nelson, Prescott, Riezebos, Ritchie, Ritchie, Ruz, Ruz, Saarnisto, Schwan, Stuiver, Taylor, Vincent, Willemse   +58 more
core   +2 more sources

Copenhagen Radiocarbon Dates VI [PDF]

Radiocarbon, 1960
The following list comprises a selected number of measurements made up to November 1963. Age calculations are based on a contemporary value equal to 95% of the activity of the NBS oxalic-acid standard, and on a half life for C14of 5570 ± 30 yr.Results are expressed in years before 1950 and in the b.c.-a.d. scales.
openaire   +5 more sources

Discovery of annual growth in a modern olive branch based on carbon isotopes and implications for the Bronze Age volcanic eruption of Santorini

Scientific Reports, 2021
The volcanic eruption of Santorini in the Bronze Age left detectable debris across the Mediterranean, serving as an anchor in time for the region, synchronizing chronologies of different sites.
Yael Ehrlich, Lior Regev, Elisabetta Boaretto   +2 more
doaj   +1 more source

RADIOCARBON INVESTIGATION OF THE BIG BAOBAB OF OUTAPI, NAMIBIA

Studia Universitatis Babes-Bolyai Chemia, 2021
The article reports the AMS (accelerator mass spectrometry) radiocarbon dating results of the Big baobab of Outapi, which is the largest African baobab of Outapi, Namibia.
Adrian PATRUT, Roxana T. PATRUT, Laszlo RAKOSY, Demetra RAKOSY, Ileana-Andreea RATIU, Karl F. VON REDEN   +5 more
doaj   +1 more source

Amino acid racemization dating of marine shells: a mound of possibilities [PDF]

, 2007
Shell middens are one of the most important and widespread indicators for human exploitation of marine resources and occupation of coastal environments. Establishing an accurate and reliable chronology for these deposits has fundamental implications for ...
Bailey, Geoffrey N., Demarchi, Beatrice, Milner, Nicky, Penkman, Kirsty, Russell, Nicola, Williams, Matthew G.M.   +5 more
core   +4 more sources

Crystallinity assessment of anthropogenic calcites using Raman micro-spectroscopy

Scientific Reports, 2023
Anthropogenic calcite is a form of calcium carbonate produced through pyrotechnological activities, and it is the main component of materials such as lime binders and wood ash.
Michael B. Toffolo, Iddo Pinkas, Ana Álvaro Gallo, Elisabetta Boaretto   +3 more
doaj   +1 more source

Chronologies for Recent Peat Deposits Using Wiggle-matched Radiocarbon Ages: Problems with Old Carbon Contamination [PDF]

, 2005
Dating sediments which have accumulated over the last few hundred years is critical to the calibration of longer-term paleoclimate records with instrumental climate data.
Charman, D.J., Garnett, M.H.
core   +1 more source

RADIOCARBON INVESTIGATION OF THE PEDUNCULATE OAK OF BOTOSANA, ROMANIA

Studia Universitatis Babes-Bolyai Chemia, 2018
The article discloses the AMS (accelerator mass spectrometry) radiocarbon dating results of the pedunculate oak of Botoşana. Four wood samples were extracted from its trunk.
Adrian PATRUT, Nicolae ROBU, Vasile SAVU, Roxana T. PATRUT, Laszlo RAKOSY, Ileana-Andreea RAŢIU, Daniel A. LOWY, Dragos MARGINEANU, Karl F. von REDEN   +8 more
doaj   +1 more source

The Bolivian Radiocarbon Database: A Countrywide Compilation of Radiocarbon Dates

Journal of Open Archaeology Data, 2023
The radiocarbon dating record from sites in the territory that comprises the Plurinational State of Bolivia has been previously included in datasets that are either obsolete, inaccurate, or incomplete.
José M. Capriles
doaj   +1 more source