Related Clues:

• Miocene, for example
• Pleistocene Epoch, e.g.
• A great age from which dates are reckoned
• Division of geological period
• Very cold epoch
• Division of a geological period
• Period of time marked by a great event
• A particular period of history
• When glaciers covered a large part of the earth's surface
• Epoch of glaciers
• Earth's period of glaciers - brrr
• Very cold era of earth's evolution
• Earth's period of glaciers
• 'When glaciers covered the earth (3,3)'
• Hard times then