In the K-T layer between the Cretaceous and Tertiary eras.
A giant hole in the ground. ________________________ That's one good clue, like Arizona's Meteor Crater. But there are others. At the boundary layer in the Earth between the Cretaceous layer of the dinosaurs and the Tertiary layer that followed, there is a sprinkling of iridium dust. Iridium is rare on Earth, but frequently found in meteorites, suggesting that a meteorite impact may be the cause of the extinction of the dinosaurs.
A meteor hit the earth in the mesozic era
Cenozoic era
The formation of the ozone layer
The ozone layer developed around 2.4 billion years ago during the Great Oxidation Event in the Earth's history. This event marked a significant increase in oxygen levels in the atmosphere, leading to the formation of the ozone layer.
The layer of iridium deposited all over Earth is known as the Cretaceous-Paleogene boundary, which marks the end of the Cretaceous period and the beginning of the Paleogene period. This layer is believed to have been deposited around 66 million years ago when a massive asteroid impact caused widespread extinctions, including the dinosaurs.
Mammals, primates and most sea animals were extinct during the mesozoic era. And what caused this is a comet hit earth and the lack of sunlight that was able to reach earth the plants died out and without a food source so did the dinosaurs
The Precambrian layer is the oldest and deepest geological layer on Earth, dating back to about 4.6 billion years ago. It encompasses all geological time before the Paleozoic Era and is characterized by the absence of complex life forms. The Precambrian layer includes the formation of the Earth, the origin of life, and the development of simple single-celled organisms.
A giant hole in the ground. ________________________ That's one good clue, like Arizona's Meteor Crater. But there are others. At the boundary layer in the Earth between the Cretaceous layer of the dinosaurs and the Tertiary layer that followed, there is a sprinkling of iridium dust. Iridium is rare on Earth, but frequently found in meteorites, suggesting that a meteorite impact may be the cause of the extinction of the dinosaurs.
The paleozoic era.
A meteor hit the earth in the mesozic era
The era in which Earth was the hottest was called the Archaean era. This was when the ocean temperatures were above 100 degrees.
The era in which Earth was the hottest was called the Archaean era. This was when the ocean temperatures were above 100 degrees.
Cenozoic era
Earth is currently in the Cenozoic Era of the Phanerozoic Eon.
The beginning of Earth's current era is marked by a mass extinction.
The 2nd named era was the Paleoarchean Era.