Mid-Pliocene reconstructed annual sea surface temperature anomaly
δ18O Benthic foraminifera 0–7 Ma
The Mid-Piacenzian Warm Period (mPWP) (prior to 2009 known as the Middle Pliocene Warm Period ), or the Pliocene Thermal Maximum, was an interval of warm climate during the Pliocene epoch that lasted from 3.3 to 3.0 million years ago (Ma).[1]