Of a geologic epoch within the Neogene period from about 1.7 million to 11,000 years ago; marked by the evolution of man, and the extinction of the large mammals
{i} geological era in which much of the earth was covered in ice (approximately 2 million to 10000 years ago)
belonging to the period in the Earth's history that started about two million years ago and ended about 10,000 years ago, when much of the Earth was covered with ice (pleistos + kainos )
The time period between about 10,000 years before present and about 1,650,000 years before present As a descriptive term applied to rocks or faults, it marks the period of rock formation or the time of most recent fault slip, respectively Faults of Pleistocene age may be considered active though their activity rates are commonly lower than younger faults
Span of geological time that began 2 5 million years ago and closed at the end of the most recent Ice Age 10,000 years ago, during which the glaciers advanced and retreated and the human species evolved
The most recent ice age whose time period spanned from 1 8 million to 11,000 years ago This is the time in earth's history that humans evolved and spread throughout most of the world Pleistocene fossils are often abundant, well-preserved, and can be dated very precisely These fossils allow scientists to determine dramatic shifts in climates and temperatures For more information and graphics on ice ages: http: //www hartwick edu/geology/work/VFT-so-far/glaciers/glacier1 html
The geological time period, from 1 6 million to 10,000 years ago, characterized by a series of advances and retreats of polar and mountain glaciers
from two million to 11 thousand years ago; extensive glaciation of the northern hemisphere; the time of human evolution
The glacial epoch preceding the Holocene, extending back from 10 000 years ago to about 1 8 to 2 million years ago The Pleistocene and Holocene epochs comprise the Quaternary period
The latest major geological epoch, colloquially known as the "Ice Age" due to the multiple expansion and retreat of glaciers (Ca 3,000,000-10,000 years BP)
An epoch within the Quaternary period that began 1 8 million and ended 11,000 years before the present
A recent geologic epoch of the Quaternary period beginning approximately one million years ago, the last glacial age
The Ice Age(s) and period in the world's history that began about 1 6 to 2 million years ago and lasted until about 10,000 years ago During this time, much of the earth was covered in ice
the span of geological time preceding the Recent epochs, during which the human species evolved It began 2 5 million years ago and ceased with the end of the last Ice Age 10 000 years ago
A period of earth history beginning about 1 6 million years ago and lasting until about 12,000 years ago During the Pleistocene or Ice Age, the earth's climate was colder and continental glaciers covered vast areas of the world
The period following the Pliocene during which an ice sheet covered the greater part of North America Named by Lyell in 1839
The period of time in earth's history, beginning about 2,000,000 years ago and continuing to the present day, during which the planet has experienced a succession of back-to-back 100,000-year glacial-interglacial climate cycles
A geologic period, usually thought of as the Ice Age, which began about 1 6 million years ago and ended with the melting of the large continental glaciers creating the modern climatic pattern about 11,500 years ago
Period in geologic history (basically the last one million years) when ice sheets covered large sections of the Earth's land surface not now covered by glaciers
Also called the Quarternary This epoch was characterized by numerous (at least 17) worldwide changes of climate, cycling between glacial (cool) and interglacial (warmer) periods, with periodicities of 100,000, 41,000 and 23,000 years During the last 18,000 years, still nominally within the Pleistocene, the Earth has been consistently growing warmer (Source: Mintzer, 1992)
in the geologists parlance, "the first epoch of the Quaternary Period " In more common usage, the Ice Age The topography, soils, and drainage patterns of the Escarpment landscape were strongly influenced by glaciation, which last occurred in this area approximately 12,000 years ago
Earlier and longer of the two epochs that constitute the Quaternary Period. The Pleistocene began 1.8 million years ago and ended 10,000 years ago. It was preceded by the Pliocene Epoch of the Tertiary Period and followed by the Holocene Epoch. At the height of the Pleistocene glacial ages, more than 30% of the land area of the Earth was covered by glacial ice; during the interglacial stages, probably only about 10% was covered. The animals of the Pleistocene began to resemble those of today, and new groups of land mammals, including humans, appeared. At the end of the epoch, mass extinctions occurred: in North America more than 30 genera of large mammals became extinct within a span of roughly 2,000 years. Of the many causes that have been proposed for these extinctions, the two most likely are changing environment with changing climate and disruption of the ecological pattern by early humans