https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.7 2026-04-15T10:53:30.610Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/8c615709-df55-4b09-a5a9-1fabb133fe1a GLACIATION A glaciation (a created composite term meaning Glacial Period, referring to thePeriod or Era of, as well as the process of High Glacial Activity), oftencalled an ice age, is a geological phenomenon in which massive ice sheets formin the Arctic and Antarctic and advance toward the equator. Conversely, theterm interglacial or Interglacial Period, such as the current era, is used todenote the absence of large-scale glaciation on a global scale ¿ i.e., anon-Ice Age. Interglacials are, in general, shorter than glacial epochs.