glacial periods
Earth's deep freezes
Glacial periods are intervals in Earth's history when global temperatures drop and ice sheets expand across continents.
The term usually refers to the ice ages of the past few million years, which have alternated with warmer interglacial periods.
Informally, glacial describes anything extremely slow or cold: The project moved at a glacial pace.
- drumlinsStreamlined glacial landforms
- glaciersSlow-moving ice masses
- eskersSubglacial stream deposits
- refugiaIsolated survival zones
- Milankovitch cyclesOrbital shifts affecting climate
Heinrich events · Younger Dryas · cold-adapted species · ice sheets · polar ice caps · moraines · land bridges · fjords · permafrost · barren · advance · prehistoric · cooling · megafauna · woolly mammoth · ice age · last ice age · frozen
- climateclimate change, climate, weather, global warming, temperature
- Ice Ageice age, mammoths, saber-tooth cat, mammoth, woolly mammoth
- prehistorystone tools, Neolithic, Stone Age, caveman, cavemen
- Earth historyice age, geological time, extinction, eons, fossil
- Stone Agecave painting, paleolithic, hand ax, handaxes, hand axe
- geologic timeeons, eon, epochs, era, epoch