e/Andean-Saharan glaciation

Information
has gloss	eng: The Andean-Saharan glaciation was from 460 Ma to 430 Ma, during the late Ordovician and the Silurian period.
lexicalization	eng: Andean-Saharan glaciation
instance of	(noun) any period of time during which glaciers covered a large part of the earth's surface; "the most recent ice age was during the Pleistocene" glacial epoch, ice age, glacial period