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GEOLOGY Pleistocene Epoch Interglacial Periods in the Past 1 Million Years

Interglacial Periods in the Past 1 Million Years

Earth's Climate Cycles: Interglacial Periods Spanned Hundreds of Thousands of Years

31 Oct 2025

How do orbital variations of Earth influence the cycle of interglacial and glacial periods during the past 1 million years?

Orbital variations have no impact; interglacial periods depend solely on volcanic activity. Orbital variations cause constant warming leading to only interglacial periods with no glaciations. Orbital variations cause changes in solar radiation that trigger warm interglacial and cold glacial cycles.