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    Uses of mass spectrometry in radioactive dating

    Ocean sediment C-14 data The Lamont-Doherty Earth Observatory of Columbia University has compiled 974 C-14 dates from 309 ocean sediments cores, covering the period from 40,000 years BP to the present worldwide. The USGS Bear Lake Project aims to create records of past climate change for the Bear Lake region,including changes in precipitation patterns during the last 10,000 years and how the size of Bear Lake has varied in the past, to assess the possibility of future flooding and drought.

    However, this inconsistency is corrected during calibration [the reason for using the (Willard F.) Libby half-life of 5568 years instead of the correct one of 5730 years has to do with the finding in about 1962 that the true half-life was 573030 years.

    About one carbon nucleus in a trillion contains two extra neutrons, giving a mass of 14.

    This carbon-14 is radioactive and decays with a half-life of 5730 years.

    If you would like to set up information regarding a project in which radiocarbon dating illuminated or solved a problem or in which C14 played a central role, please contact [email protected] The Origins of Angkor Archaeological Project From the University of Otago (New Zealand) and the Fine Arts Department of Thailand, the project is concerned with investigating archaeology of pre-formative Angkorean society of South East Asia.

    Radiocarbon dating underpins the chronological aspects of the investigation.

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