1. Any of the geologic periods which embraced an ice age; for example, the Quaternary period may be called a glacial period. 2. Generally, an interval of geologic time which was marked by a major equatorward advance of ice.
Related terms:
1. Any of the geologic periods which embraced an ice age; for example, the Quaternary period may be called a glacial period. 2. Generally, an interval of geologic time which was marked by a major equatorward advance of ice.
Related terms: