The major factors in glacial periods lasting tens of millions of years appear to be ____________________.

Question

Quizplus · Accepted Answer

Having one or more large continental masses near the poles and oceanic circulation that is more longitudinal (north-south) than latitudinal (east-west) are the two major factors in glacial periods lasting tens of millions of years. Both factors contribute to cooler temperatures at the poles, which promote the growth and maintenance of large ice sheets.

The Major Factors in Glacial Periods Lasting Tens of Millions