GENERAL GEOLOGY

Detailed explanation-1: -The Cretaceous-Paleogene extinction event is the most recent mass extinction and the only one definitively connected to a major asteroid impact. Some 76 percent of all species on the planet, including all nonavian dinosaurs, went extinct. Over a thousand dinosaur species once roamed the Earth.

Detailed explanation-2: -Mass extinctions-when at least half of all species die out in a relatively short time-have occurred only a handful of times over the course of our planet’s history. The largest mass extinction event happened around 250 million years ago, when perhaps 95 percent of all species went extinct.

Detailed explanation-3: -The largest extinction in Earth’s history marked the end of the Permian period, some 252 million years ago.

Detailed explanation-4: -An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the biodiversity on Earth. Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms.

Detailed explanation-5: -End Ordovician (444 million years ago; mya) Late Devonian (360 mya) End Permian (250 mya) End Triassic (200 mya) – many people mistake this as the event that killed off the dinosaurs. End Cretaceous (65 mya) – the event that killed off the dinosaurs. 30-Nov-2022