Results 131 to 140 of about 112,190 (278)

New radiocarbon dates from the Bapot-1 site in Saipan and Neolithic dispersal by stratified diffusion [PDF]

, 2010
The colonisation of the Mariana Islands in Western Micronesia is likely to represent an early ocean dispersal of more than 2000 km. Establishing the date of human arrival in the archipelago is important for modelling Neolithic expansion in Island ...
Carson, Mike, Clark, Geoffrey, O’Day, Patrick, Petchey, Fiona, Winter, Olaf   +4 more
core   +1 more source

On the astronomical origin of the Hallstatt oscillation found in radiocarbon and climate records throughout the Holocene

, 2016
An oscillation with a period of about 2100-2500 years, the Hallstatt cycle, is found in cosmogenic radioisotopes (C-14 and Be-10) and in paleoclimate records throughout the Holocene. Herein we demonstrate the astronomical origin of this cycle.
Bianchini, Antonio, Milani, Franco, Ortolani, Sergio, Scafetta, Nicola   +3 more
core   +1 more source

Fecal Steroids as Tracers of Human Population and Waste Management Practices at the Ancient Maya City of Ucanal, Guatemala

Archaeometry, EarlyView.
ABSTRACT Geochemical data compiled from dried sediments from three water reservoirs at the ancient Maya city of Ucanal, Petén, Guatemala, reveal low to undetectable fecal biomarker concentrations. These low concentrations may be the result of the aerobic decay of sterols combined with well‐managed waste disposal practices.
Jean D. Tremblay, Peter M. J. Douglas, Christina T. Halperin, Yves Gélinas   +3 more
wiley   +1 more source

Ring‐Width Dendrochronology, Isotopic Dendrochronology and Radiocarbon Dating of Timbers From the Spire Scaffold of Salisbury Cathedral, Wiltshire, England

Archaeometry, EarlyView.
ABSTRACT Ten timbers from the spire scaffold of Salisbury Cathedral were dated using a combination of ring‐width dendrochronology, stable oxygen isotopic dendrochronology and radiocarbon dating. Seven timbers were coeval and assigned a combined empirical felling date range of 1352–1378, which was further refined to 1351–1359 (OxCal 95.4%).
Kutsi D. Akcicek, Daniel Miles, Christopher Bronk Ramsey, Darren Davies, Danny McCarroll, Neil J. Loader   +5 more
wiley   +1 more source

Progress in AMS target production in sub-milligram samples at the NERC Radiocarbon Laboratory [PDF]

, 2005
. Recent progress in graphite target production for sub-milligram environmental samples in our facility is presented. We describe an optimized hydrolysis procedure now routinely used for the preparation of CO2 from inorganic samples, a new high-vacuum ...
Bryant, Charlotte L., Currie, Margaret, Ertunc, Tanya, Freeman, Stewart T., Maden, Colin, Murray, Callum, Xu, Sheng   +6 more
core  

Navigating the Flames: Comparative Analysis of Cremation Practices in the Roman and Early Medieval Periods at Gbely‐Kojatín (SK) and Přítluky (CZ)

Archaeometry, EarlyView.
ABSTRACT Cremation became the dominant funerary practice in the Middle Danube Region during the Roman Period (RP) (1st–4th century) and reappeared in the Early Medieval Ages (EMA) (6th/7th–8th century). This study aims to reconstruct differences in cremation conditions from the Gbely‐Kojatín site (Slovakia, RP and EMA) and the Přítluky site (Czech ...
Katarína Hladíková, Anna Pankowská, Marek Hladík, Pavla Kučerová, Rastislav Milovský   +4 more
wiley   +1 more source

Incorporation of Deepwater Horizon oil in a terrestrial bird

Environmental Research Letters, 2016
Carbon isotopic evidence revealed Deepwater Horizon (DWH) oil entering coastal planktonic and lower terrestrial food webs. The integration of spilled oil into higher terrestrial trophic levels, however, remains uncertain. We measured radiocarbon ( ^14 C)
A Bonisoli-Alquati, P C Stouffer, R E Turner, S Woltmann, S S Taylor   +4 more
doaj   +1 more source

An Archaeometric Approach to Reveal Organic Compounds via GC‐MS Analyses of Two Discovered Incense Burners at Daba Al‐Bayah

Archaeometry, EarlyView.
ABSTRACT This study focuses on two terracotta incense burners discovered in the Daba Al‐Bayah necropolis in the Musandam Peninsula (Oman), associated with an Iron Age collective tomb (LCG‐2). Through gas chromatography–mass spectrometry (GC‐MS), the organic residues preserved within these artifacts were analyzed to investigate their use and ...
Francesco Genchi, Federica Spagnoli, Vittorio Vinciguerra, Stefania Garzoli   +3 more
wiley   +1 more source

Metastatic Prostate Carcinoma in an Early 18th-Century South German Abbot—Interdisciplinary Research Reveals Clues to His Final Disease History

Heritage
This interdisciplinary investigation of the human remains of Balduin Helm, one of the most important abbots of the Fürstenfeld monastery, provides novel information on this historic individual.
Andreas G. Nerlich, Stephanie Panzer, Christine Lehn, Christian Hamann, Simon T. Donell, Oliver K. Peschel   +5 more
doaj   +1 more source

Assessing fossil fuel CO2 emissions in California using atmospheric observations and models

Environmental Research Letters, 2018
Analysis systems incorporating atmospheric observations could provide a powerful tool for validating fossil fuel CO _2 (ffCO _2 ) emissions reported for individual regions, provided that fossil fuel sources can be separated from other CO _2 sources or ...
H Graven, M L Fischer, T Lueker, S Jeong, T P Guilderson, R F Keeling, R Bambha, K Brophy, W Callahan, X Cui, C Frankenberg, K R Gurney, B W LaFranchi, S J Lehman, H Michelsen, J B Miller, S Newman, W Paplawsky, N C Parazoo, C Sloop, S J Walker   +20 more
doaj   +1 more source