What is the period in history where goobal temperatures plummet and there is extensive glaciation ?

The period in history where global temperatures plummet and there is extensive glaciation is known as an ice age. Ice ages are characterized by the expansion of ice sheets and glaciers, leading to lower global temperatures and significant changes in climate patterns. The most recent ice age occurred during the Pleistocene epoch, which lasted from about 2.6 million to 11,700 years ago.