Intercalibration of astronomical and radioisotopic time

  title={Intercalibration of astronomical and radioisotopic time},
  author={Paul R. Renne and Alan L. Deino and Robert C. Walter and Brent D. Turrin and Carl C. Swisher and Tim A. Becker and Garniss H. Curtis and Warren D. Sharp and Abdur-Rahim Jaouni},
The 40Ar/39Ar radioisotopic dating technique is one of the most precise and versatile methods available for dating events in Earth's history, but the accuracy of this method is limited by the accuracy with which the ages of neutron-fluence monitors (dating standards) are known. Calibrating the ages of standards by conventional means has proved difficult and contentious. The emerging astronomically calibrated geomagnetic polarity time scale (APTS) offers a means to calibrate the ages of 40Ar… 

Direct intercalibration of radio-isotopic and astronomical time in the Mediterranean neogene

As accurate measurement of geological time is the key to understanding processes that occurred in the Earth's history, development and testing of time scales is a first order problem in the

Perspectives on 40Ar/39Ar dating

Abstract Isotopic dating of geological samples using the K/Ar method and its variant, the 40Ar/39Ar dating technique, provides ages that in favourable circumstances are precise and accurate to within

Synchronizing Rock Clocks of Earth History

This calibration of tephras in marine deposits in Morocco to calibrate the age of Fish Canyon sanidine provides tight constraints for the astronomical tuning of pre-Neogene successions, resulting in a mutually consistent age of ∼65.95 Ma for the Cretaceous/Tertiary boundary.

Time scale controversy: Accurate orbital calibration of the early Paleogene

Timing is crucial to understanding the causes and consequences of events in Earth history. The calibration of geological time relies heavily on the accuracy of radioisotopic and astronomical dating.

Orbital tuning of geomagnetic polarity time-scales

  • D. Kent
  • Geography, Environmental Science
    Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
  • 1999
Climate cyclicity and magnetic polarity stratigraphy are being successfully combined as a powerful geochronometer in the astronomical polarity time-scale (APTS) and there has been renewed speculation about an obliquity-modulated precessional geodynamo based on periodicities in relative palaeointensity data from Ocean Drilling Program sediment cores.