We review the ages of Quaternary magnetic polarity reversals and magnetic excursions.
Improvements in radioisotopic 40 Ar/39 Ar dating of reversals and excursions reflect the use …

Reversals and excursions of Earth's geomagnetic field create marker horizons that are
readily detected in sedimentary and volcanic rocks worldwide. An accurate and precise …

Marked by a progressive increase in the amplitude of climate oscillations, an evolving
waveform, and a shift towards a quasi-100 ky frequency, the Early–Middle Pleistocene …

The early Pleistocene colonization of temperate Eurasia by Homo erectus was not only a
significant biogeographic event but also a major evolutionary threshold. Dmanisi's rich …

Coupled relative geomagnetic paleointensity (RPI) and oxygen isotope records are used to
construct RPI and oxygen isotope stacks for the last 1.5 Myr. The coupled correlations are …

Ascertaining the timing of the peopling of Europe, after the first out-of-Africa demographic
expansion at the end of the Pliocene, is of great interest to paleoanthropologists. One of the …

Abstract The accuracy of 40 Ar/39 Ar geochronology relies in large part on precise and
accurate calibration of the ages and K-Ar isotopic compositions of standards. A widely used …

The rewards from resolving the tempo of magmatic, paleobiologic, paleoclimatic, and
tectonic processes at better than the per mil level of precision have spurred a quest within …

Six tuffaceous beds within the Omo Group of the Omo–Turkana Basin have been dated
using the 40Ar/39Ar single crystal total fusion method on anorthoclase, yielding eruption …

Long paleoecological records are critical for understanding evolutionary responses to
environmental forcing and unparalleled tools for elucidating the mechanisms that lead to the …