WebThe Andean-Saharan glaciation, also known as the Early Palaeozoic Icehouse, the Early Palaeozoic Ice Age, the Late Ordovician glaciation, the end-Ordovician glaciation, or the Hirnantian glaciation, occurred during the Paleozoic from approximately 460 Ma to around 420 Ma, during the Late Ordovician and the Silurian period. The major glaciation during …

WebA glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate between glacial periods.The Last Glacial Period ended about 15,000 years ago. The Holocene is the current …

WebThe Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma (million years ago) and is ongoing. Although geologists describe this entire period up to the present as an "ice age", in popular culture this term usually refers to the most recent …

WebAn ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers.Earth's climate alternates between ice ages and greenhouse periods, during which there are no glaciers on the planet.Earth is currently in the Quaternary glaciation.

WebThe Sturtian glaciation was a glaciation, or perhaps multiple glaciations, during the Cryogenian Period when the Earth experienced repeated large-scale glaciations. The duration of the Sturtian glaciation has been variously defined, with dates ranging from 717 to 643 Ma. Stern et al. place the period at 715 to 680 Ma.. According to Eyles and Young, …

WebThere have been five or six major ice ages in the history of Earth over the past 3 billion years. The Late Cenozoic Ice Age began 34 million years ago, its latest phase being the Quaternary glaciation, in progress since 2.58 million years ago.. Within ice ages, there exist periods of more severe glacial conditions and more temperate conditions, referred to as …

WebSchneeball Erde (englisch Snowball Earth) oder Schneeball-Erde ist eine geowissenschaftliche Hypothese über mehrere globale Vereisungen im späten Präkambrium (Neoproterozoikum), deren letzte Phase vor etwa 580 Millionen Jahren endete.Während dieser Eiszeitalter seien Gletscher von den Polen bis in Äquatornähe …

WebThe Valparaiso Moraine is a recessional moraine (a land form left by receding glaciers) that forms an immense U around the southern Lake Michigan basin in North America.It is the longest moraine.It is a band of hilly terrain composed of glacial till and sand.The Valparaiso Moraine forms part of the Saint Lawrence River Divide, bounding the Great Lakes Basin.

WebThe Wolstonian Stage is a middle Pleistocene stage of the geological history of Earth from approximately 374,000 until 130,000 years ago. It precedes the Eemian Stage in Europe and follows the Hoxnian Stage in the British Isles.. It is also approximately analogous to the Warthe and Saalian stages in northern Europe; the Riss glaciation in the Alps; and the …

WebThe Last Glacial Maximum (LGM), also referred to as the Late Glacial Maximum, was the most recent time during the Last Glacial Period that ice sheets were at their greatest extent. Ice sheets covered much of Northern North America, Northern Europe, and Asia and profoundly affected Earth's climate by causing drought, desertification, and a large drop in …