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Geological history of oxygen. O build-up in the Earth's atmosphere. Red and green lines represent the range of the estimates while time is measured in billions of years ago ( Ga ). Stage 1 (3.85–2.45 Ga): Practically no O in the atmosphere. Stage 2 (2.45–1.85 Ga): O produced, but absorbed in oceans and seabed rock.
Youngest Toba eruption. Coordinates: 2.6845°N 98.8756°E. The Toba eruption (sometimes called the Toba supereruption or the Youngest Toba eruption) was a supervolcanic eruption that occurred about 74,000 years ago during the Late Pleistocene [1] at the site of present-day Lake Toba in Sumatra, Indonesia. It was the last in a series of at least ...
Geologic temperature record. The are changes in Earth 's environment as determined from geologic evidence on multi-million to billion (10 9) year time scales. The study of past temperatures provides an important paleoenvironmental insight because it is a component of the climate and oceanography of the time.
Stages 4 and 5 (0.85 Ga – present): Other O 2 reservoirs filled; gas accumulates in atmosphere. [1] The Great Oxidation Event ( GOE) or Great Oxygenation Event, also called the Oxygen Catastrophe, Oxygen Revolution, Oxygen Crisis or Oxygen Holocaust, [2] was a time interval during the Early Earth 's Paleoproterozoic era when the Earth's ...
The Last Glacial Maximum ( LGM ), also referred to as the Last Glacial Coldest Period, [1] was the most recent time during the Last Glacial Period where ice sheets were at their greatest extent 26,000 and 20,000 years ago. [2] Ice sheets covered much of Northern North America, Northern Europe, and Asia and profoundly affected Earth 's climate ...
The Carboniferous ( / ˌkɑːrbəˈnɪfərəs / KAR-bə-NIF-ər-əs) [6] is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period 358.9 Ma (million years ago) to the beginning of the Permian Period, 298.9 Ma.
After 1.5 million years ago (extinction of Paranthropus), all fossils shown are human (genus Homo). After 11,500 years ago (11.5 ka, beginning of the Holocene), all fossils shown are Homo sapiens (anatomically modern humans), illustrating recent divergence in the formation of modern human sub-populations.
Box office. $1.85 million (US and Canadian rentals) [1] 3:10 to Yuma is a 1957 American Western film directed by Delmer Daves, starring Glenn Ford and Van Heflin. Based on a 1953 short story by Elmore Leonard, it is about a drought-impoverished rancher who takes on the risky job of escorting a notorious outlaw to justice.
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