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The Permian mass extinction occurred about 248 million years ago and was the greatest mass extinction ever recorded in earth history exterminating more than 95% of all life on EarthTwo theories have been proposed - the impact of a huge meteorite or comet over 10 kilometres in diameter, or a massive and prolonged volcanic eruption. The volcanic theory appears to be taking the lead at the present time.
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoThere is still a lot of speculation about the causes of mass extinctions. At one time it was thought that they were all related to cometary or asteroidal impacts. Now it is thought that the second mass extinction was probably related to a vast bacterial bloom which released toxic quantities of hydrogen sulfide.
Wiki User
∙ 12y agoIt depends which you are referring to, if you mean the extinction of dinosaurs it may have been asteroids are another cause or if you mean the toba extinction it was caused by a supervolcanic erruption or you may mean the present extinction which is caused by humans
Wiki User
∙ 13y agooxygen
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When was the first mass extinction?
540 million years ago was the first mass extinction
When the last member of a species dies is said to have occurred.?
the answer to the question is extinction
Two-thirds of all terrestrial life disappeared in the last mass extinction approximately?
Approximately 245 million years ago
When did organisms suffer the largest mass extinction known?
The most devastating mass extinction occurred in the Late Permian (~250 million years ago).
What is the disappearance of a species from all part of an environment?
Is extinction the word you're looking for ?
What caused each mass extinction?
Asteroids.
What may have caused the first mass extinction 65 million years ago?
An asteroid impact caused a mass extinction about 65 million years ago
Relationship between extinct and mass extinction?
Mass extinction is when many animals go extinct within a short period of time caused by the same variables/factors leading to the mass extinction.
How do you use the word mass extinction in a sentence?
We are still not sure what caused the mass extinction of the dinosaurs, though an asteroid impact seems to be the popular theory.Scientists believe we may be heading towards another mass extinction event.
Who disappeared during the last mass extinction?
Notable extinctions during the last mass extinction included all non-avian dinosaurs, pterosaurs, plesiosaurs, and ammonites.
When was the last mass extinction?
The Cretaceous–Tertiary extinction event 65 million years ago was the last mass-extinction, and many believe that humans are causing a mass-extinction right now.
What is some catastrophic events that caused periods to come to an end?
mass extinction
The mass extinction at the end of the Mesozoic Era was caused by .?
a comet impacting the earth
What is the K-T extinction?
The k-t extinction marks the transition from the cretaceous to the tertiary period in which it is hypothesized that a meteorite struck the Earth and caused a mass extinction.
What was the mass extinction that was most likely caused by the formation and retreat of glaciers?
"It was the Cretaceous-Tertiary or the K-T Extinction." - WrongThe K-T Extinction was the mass extinction that wiped out the dinosaurs, which was more widely believed to be caused by a heavenly body colliding with the Earth.The mass extinction that involved a large period of glaciation was in truth the Ordovician-Silurian Extinction, which was the earliest mass extinction.The extinction is associated with a period of glaciation. First, sea levels dropped as glaciers formed. Later, as the glaciers melted, the sea level rose. The cause of this glaciation remains a mystery. One suggestion is land plants caused it by absorbing large amounts of carbon dioxide from the atmosphere. The drop in carbon dioxide could then have caused global cooling.
What is the effect of mass extinction?
The effect of mass extinction is extinction, death of a mass
Was there a mass extinction during the last ice age?
Many geologists consider what you call the "last ice age" to be the last glacial of the present Ice Age, with the ice retreat starting only about 10-12ka. There was no mass extinction. A good many species did migrate or disappear altogther as the ice retreated, but in no way was it a mass extinction.
