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Radiocarbon ages of humic substances in chernozems
Eurasian Soil Science, 2008Data on radiocarbon ages of different fractions of humus (humic acids, fulvic acids, and humin) in the profiles of chernozems are analyzed. A chronoecological grouping of humus in modern and buried (fossil) soils is suggested. An increase in the radiocarbon age of humic substances down the soil profile has a stepwise character. It is shown that the 14C
I. V. Ivanov, O. S. Khokhlova
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Radiocarbon Age of the Damariscotta Shell Heaps
American Antiquity, 1957The large oyster shell heaps on both sides of the Damariscotta River, just north of the towns of Damariscotta and Newcastle, Maine, have been known for many years and both geologists and archaeologists have speculated about their age. During the summer of 1955 I made 2 collections of Mya shells from the largest shell heap on the west side of the river (
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Age determination by the radiocarbon method
1999Radioaktivni izotop ugljika, 14C, nastaje u atmosferi međudjelovanjem neutrona iz kozmičkog zračenja i jezgara 14N. Nastali 14C atomi se oksidiraju u 14CO2, koji se s oksidima drugih ugljikovih izotopa jednoliko raspodjeljuje po cijeloj atmosferi, hidrosferi i biosferi, te tako ulazi u životni ciklus biljaka, životinja i ljudi.
Obelić, Bogomil +2 more
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Radiocarbon ages of sediment: Great barrier reef
Sedimentary Geology, 1969Abstract Sedimentary material from the floor of the Queensland continental shelf, as well as beach-rock and reef-rock from inner and marginal shelf reefs of the Great Barrier Reef, have been dated by 14 C methods. The results confirm previous evidence of relict facies on the shelf but do not lend support to the view that lithified surfaces of inner ...
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Age Determination by Radiocarbon Content: World-Wide Assay of Natural Radiocarbon
Science, 1949W F, Libby, E C, Anderson, J R, Arnold
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Radiocarbon chronology and Bayesian age model
2022Philippsen, Bente, Olsen, Jesper
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