Results 81 to 90 of about 278,677 (199)

Table 1: AMS 14C age dating of sediment core BP99-04

, 2003
Table 1: AMS 14C age dating of sediment core BP99 ...
Stein, Ruediger, Ruediger Stein (6885428), Jens Matthiessen (6960179), Matthiessen, Jens, Kraus, Matthias, Matthias Kraus (6974351)   +5 more
core   +1 more source

Exploring different methods of cellulose extraction for ¹⁴C dating.

New J Chem, 2021
Cercatillo S, Friedrich M, Kromer B, Paleček D, Talamo S.   +4 more
europepmc   +1 more source

Influence of solar luminosity over geomagnetic and climatic cycles as derived from speleothems [PDF]

International Journal of Speleology, 2004
We observed cycles presented in a luminescent solar insolation proxy record from a speleothem from Jewel Cave, South Dakota, US. We found cycles of orbital precession with periods of 23 and 19 ka and of obliquity of 41 ka and many others from non ...
Shopov Yavor Y., Stoykova Diana, Tsankov Ludmil, Sanabria Michael, Georgieva Desislava, Ford Derek Clifford, Georgiev Leonid   +6 more
doaj  

Tracing ancient solar cycles with tree rings and radiocarbon in the first millennium BCE

Nature Communications
The Sun drives Earth’s energy systems, influencing weather, ocean currents, and agricultural productivity. Understanding solar variability is critical, but direct observations are limited to 400 years of sunspot records.
Nicolas Brehm, Charlotte L. Pearson, Marcus Christl, Alex Bayliss, Kurt Nicolussi, Thomas Pichler, David Brown, Lukas Wacker   +7 more
doaj   +1 more source

14C dating of Arctic deep-sea sediment

This dataset consist of 14C dating of planktonic foraminifera Neogloboquadrina pachyderma extracted from a sediment core over depth retrieved by gravity coring.
Leth Jørgensen, Steffen, Møller, Tor Einar, Brendryen, Jo   +2 more
core   +1 more source

14C and 14C–10Be Terrestrial Age Dating System for Stony Meteorites [PDF]

This project aims to improve the accuracy of meteorite terrestrial age dating by refining the 14C and 14C-10Be dating system. By studying how 14C production rates and 14C/10Be ratios vary with shielding depth, this research project establishes a more ...
Tauseef, Mohammad
core   +1 more source

Datação radiocarbônica de sítios arqueológicos do tipo sambaqui pela técnica de absorção de CO2: uma alternativa à síntese benzênica

Química Nova, 2004
The sambaquis are archaeological sites with remains of pre-historical Brazilian civilizations. They look like small hills containing different kinds of shells, animal and fish bones, small artifacts and even human skeletons.
Mendonça Maria Lúcia T. G., Godoy José Marcus   +1 more
doaj  

From 14C/12C measurements towards radiocarbon dating of ice [PDF]

, 1994
A dry extraction method of CO2 included in glacier ice adds a contamination equivalent to 1.8 mg modern carbon for a 35 mg C sample. This enablesradiocarbon dating by accelerator mass spectrometry of 35 mg samples to about 25000 BP.
Borg, K., Raynaud, D., van de Wal, R. S. W., van Roijen, J. J., Oerlemans, J., Lipenkov, V., Huybrechts, Philippe   +6 more
core  

14C Dating Mortar in Ireland

, 1992
I have developed a method of dating early medieval Irish buildings using charcoal encased in mortar. Due to the inclement weather over centuries, timbers do not preserve well in these structures, leaving little suitable material for 14C dating. Initially,
Berger, Rainer
core  

14C and 10Be around 1650 cal BC

, 2009
There is a debate about the date of the Minoan eruption of Santorini as reconstructed from a branch of an olive tree that was buried alive in trephra on Santorini2 and the dating of an ice core horizon attributed to this eruption.3 The olive branch was ...
Muscheler, Raimund,
core