Results 11 to 20 of about 64,269 (303)

Human palaeoenvironment in the Upper Kama River basin: experience of reconstruction [PDF]

open access: yesВестник археологии, антропологии и этнографии, 2021
Here, we present the results of comprehensive (archaeological and palaeoecological) studies undertaken in 2014–2018 in the basin of the Upper Kama River in the north of Perm Region, eastern part of the East European Plain.
Lychagina E.L.   +6 more
doaj   +1 more source

Evidence for late polynesian colonization of New Zealand: University of Waikato radiocarbon measurements [PDF]

open access: yes, 1997
We present radiocarbon determinations for 271 New Zealand archaeological samples measured at the University of Waikato Radiocarbon Dating Laboratory between 1975 and 1995.
T. F. G. Higham   +5 more
core   +1 more source

Radiocarbon determinations from the Mulifanua Lapita site, Upolu, western Samoa [PDF]

open access: yes, 2001
The Mulifanua ferry berth has the distinction of being the only site in Samoa with dentate-stamped Lapita wares, and is the most easterly Lapita site in the Pacific.
Petchey, Fiona, Petchey, Fiona J.
core   +1 more source

Biases in radiocarbon dating of organic fractions in sediments from meromictic and seasonally hypoxic lakes [PDF]

open access: yesBulletin of the Geological Society of Finland, 2019
We present here radiocarbon dating results from two boreal lakes in Finland, which are permanently (meromictic) or seasonally stratified and contain continuous sequences of annually laminated sediments that started to form in the early Holocene.
Antti E.K. Ojala   +4 more
doaj   +1 more source

Social and biophysical vulnerability of prehistoric societies to Rapid Climate Change

open access: yesDocumenta Praehistorica, 2010
Previous studies of the impact of Rapid Climate Change (RCC) on prehistoric com- munities have often been restricted in their explanatory power due to the lack of an appropriate analytical tool capable of combining palaeoclimate data with archaeological ...
Lee Clare, Bernhard Weninger
doaj   +1 more source

Impact of the Fukushima Accident on 3H and 14C Environmental Levels: A Review of Ten Years of Investigation

open access: yesMolecules, 2023
The investigation of the impact of the Fukushima accident is still going on although more than ten years have passed since the disaster. The main goal of this paper was to summarize the results of tritium and radiocarbon determinations in different ...
Jakub Kaizer   +2 more
doaj   +1 more source

Radiocarbon Dating of Intercomparison Samples at the Zagreb Radiocarbon Laboratory [PDF]

open access: yesRadiocarbon, 1990
The Radiocarbon and Tritium Laboratory of the Rudjer Bošković Institute, Zagreb, participated in the International Collaborative Study (ICS) in all three stages. All measurements were made by proportional counting of methane. We present here a statistical analysis of our results. A comparison with the mean or median values of reported ICS values showed
Obelić, Bogomil   +3 more
openaire   +2 more sources

Concepts of probability in radiocarbon analysis

open access: yesDocumenta Praehistorica, 2011
In this paper we explore the meaning of the word probability, not in general terms, but restricted to the field of radiocarbon dating, where it has the meaning of ‘dating probability assigned to calibrated 14C-ages’.
Bernhard Weninger   +3 more
doaj   +1 more source

Belfast Radiocarbon Dates VI [PDF]

open access: yesRadiocarbon, 1970
The dating equipment and operating conditions remain essentially as previously described. This list includes some small samples counted at a filling pressure equivalent to 76cm Hg. at 20°C. Carbon isotope ratios were obtained and calculated as described (R., 1973, v. 15, p. 212). All samples are from Ireland.
A. G. Smith   +2 more
openaire   +7 more sources

Radiocarbon, Ltd. Natural Radiocarbon Measurements I [PDF]

open access: yesRadiocarbon, 1971
Radiocarbon, Ltd. is a privately owned laboratory designed to provide quality service to the archaeologic and geologic communities. Operations began in 1969 using standard techniques for preparation, conversion to CO2, and purification of samples prior to counting.
openaire   +2 more sources

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