JadeWyoming State State Mineral & Gem News Society, Inc. Award-Winning WSMGS Website: wsmgs.org Volume 2021, Issue # 1 Glacial Ice Ages By Emma Groeneveld Ancient History Encyclopedia* An ice age is a period in which the earth's climate is colder than normal, with ice sheets capping the poles and glaciers dominating higher altitudes. Within an ice age, there are varying pulses of colder and warmer climatic conditions, known as “glacials” and “interglacials.” Even within the interglacials, ice continues to cover at least one of the poles. In contrast, outside an ice age, temperatures are higher and more stable, and there is far less ice covering the WSMGS OFFICERS Earth. The Pleistocene Epoch is typically defined as the time period that began President: Jim Gray about 2.6 million years ago and lasted until about 11,700 years ago. The
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[email protected] Woolly mammoth is the most recognized of the glacial ice-age animals. Credit: Yukon Beringia, https://beringia.com (Continued on Page 2) Jade State News Editor: Ilene Olson
[email protected] Table of Contents Glacial Ice Ages...........................................................................................Page 1 RMFMS WY State Director: Natural Trap Cave........................................................................................Page 5 Jim Gray Wyoming Valley Glaciers............................................................................Page