| Milankovitch postulated that deglaciation occurs when Earth’s obliquity is high and
precession brings Earth’s eccentric orbit near the sun during Northern summer, and
this general concept has been elaborated to show how precession, obliquity, or a
combination of both could govern the timing of glaciation. Â Observational tests have
demonstrated that obliquity paces the ~100 ky glacial cycles but have been inconclusive
with regard to precession, primarily because precession’s shorter period demands
greater age accuracy. Â Here both obliquity (p |