An asteroid from space, like the one that killed the dinosaurs, which was a mile in width.
Frequent volcanic eruptions
One type of catastrophic change that can cause a mass extinction is an asteroid impact. When a large asteroid collides with the Earth, it can release massive amounts of energy, cause widespread destruction, trigger tsunamis and wildfires, and create a global "impact winter" due to the release of dust and debris into the atmosphere. Such an event is believed to have caused the extinction of the dinosaurs 65 million years ago.
Gasses released by a massive volcanic event can cause catastrophic climate changes. Carbon dioxide will raise global temperatures. while sulfur dioxide will lower temperatures.
About 65.5 million years ago. The Cretaceous and Tertiary are geological time periods either side of this event. The event is significant because there was a large mass extinction event at this time including the extinction of all non avian dinosaurs. Most experts agree that the cause of the extinction was a asteroid impact.
The extinction of a large number of species within a relatively short period of geological time. Caused by some catastrophic global event or widespread environmental change to which species can not adapt
No, child, I was not a witness to the Permian Extinction. The Permian extinction event is the only known mass extinction of insects. The Permian extinction event occurred about 252 million years ago.
Mass extinction. A mass extinction typically occurs after a catastrophic global event. This event could be a bolide impact (such as the impact 65 million years ago that killed the dinosaurs, the most famous example of a mass extinction), increased volcanism, climate change, or something similar.
One type of catastrophic change that can cause a mass extinction is an asteroid impact. When a large asteroid collides with the Earth, it can release massive amounts of energy, cause widespread destruction, trigger tsunamis and wildfires, and create a global "impact winter" due to the release of dust and debris into the atmosphere. Such an event is believed to have caused the extinction of the dinosaurs 65 million years ago.
mass extinction
There were five major extinction events in the past. They are called the Cretaceous-Tertiary (or K-T) extinction event, the late Devonian mass extinction, the Permian mass extinction, the Ordovician-Silurian mass extinction and the Triassic-Jurassic mass extinction event.
Scientists believe the Cretaceous-Paleogene extinction event, or the plants dying at the end of the Mesozoic Era, was caused by a massive asteroid/comet impact. The theory suggests that the impact had catastrophic effects on the environment, including an impact winter, which prevented the plants from carrying out photosynthesis.
Gasses released by a massive volcanic event can cause catastrophic climate changes. Carbon dioxide will raise global temperatures. while sulfur dioxide will lower temperatures.
Gasses released by a massive volcanic event can cause catastrophic climate changes. Carbon dioxide will raise global temperatures. while sulfur dioxide will lower temperatures.
Mass depletion is an event in which extinction rates are higher than normal but not high enough to be classified as a mass extinction.
About 65.5 million years ago. The Cretaceous and Tertiary are geological time periods either side of this event. The event is significant because there was a large mass extinction event at this time including the extinction of all non avian dinosaurs. Most experts agree that the cause of the extinction was a asteroid impact.
The extinction of a large number of species within a relatively short period of geological time. Caused by some catastrophic global event or widespread environmental change to which species can not adapt
No, child, I was not a witness to the Permian Extinction. The Permian extinction event is the only known mass extinction of insects. The Permian extinction event occurred about 252 million years ago.
Which mass extinction? There have been five such events. The first one, the Ordovician-Silurian extinction event occurred before the Devonian. The Late Devonian event occurred during the Devonian. All other mass extinctions occurred after the Devonian.