Questions about glaciations, glacial periods or ice ages. Including the evidence of their existence, the conditions during such periods and the causes.
A glaciation (or glacial period) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate between glacial periods. The last glacial period ended about 15,000 years ago. The Holocene epoch is the current interglacial.
However, glaciation in a more broad sense can be used also to describe ice ages as a whole.