Search results
Results From The WOW.Com Content Network
It was the last in a series of at least four caldera-forming eruptions there, the earlier known caldera having formed about 1.2 million years ago. [3] This, the last eruption had an estimated volcanic explosivity index of 8, making it the largest known explosive volcanic eruption in the Quaternary, and one of the largest known explosive ...
The controversial Toba catastrophe theory, presented in the late 1990s to early 2000s, suggested that a bottleneck of the human population occurred approximately 75,000 years ago, proposing that the human population was reduced to perhaps 10,000–30,000 individuals [14] when the Toba supervolcano in Indonesia erupted and triggered a major ...
An archaeological site in Ethiopia has revealed that a population of humans survived the eruption of ... Mount Toba 74,000 years ago. ... took place around 70,000 to 50,000 years ago. ...
Extinction Date Probable causes [2] Quaternary: Holocene extinction: c. 10,000 BC – Ongoing: Humans [3] Quaternary extinction event: 640,000, 74,000, and 13,000 years ago: Unknown; may include climate changes, massive volcanic eruptions and Humans (largely by human overhunting) [4] [5] [6] Neogene: Pliocene–Pleistocene boundary extinction: 2 Ma
When dinosaurs got big. Another period of extreme volcanic activity 201 million years ago marked the end-Triassic mass extinction. It has been linked to the breakup of the Pangea supercontinent ...
The Yellowstone Caldera formed over 600,000 years ago from the Lava Creek Tuff eruption, which was measured on the Volcanic Explosivity Index as an 8, according to the U.S. Geological Survey ...
The Siberian Traps are thought to have played a significant role in the Permian–Triassic extinction event 252 million years ago. Formation of the Emeishan Traps began 260 million years ago. The Late Devonian extinction occurs about 374 million years ago. The Ordovician–Silurian extinction event occurs between 450 and 440 million years ago.
Eruptions the size of that at Lake Toba 74,000 years ago, at least 2,800 cubic kilometres (670 cu mi), or the Yellowstone eruption 620,000 years ago, around 1,000 cubic kilometres (240 cu mi), occur worldwide every 50,000 to 100,000 years.