about 4.5 billions years ago.
Mars is believed to have formed about 4.6 billion years ago, around the same time as the rest of the solar system. It was formed from the same cloud of gas and dust that gave rise to the Sun and the other planets.
Mt. Hood was formed 2,000 years ago.
Planets are not actually born, they are formed. In the case of Mars, the date would be about four and a half billion years ago.
Most planetary scientists agree that Mars probably formed after the manner in which the other planets were formed. An accretion disk took shape in the orbital area where Mars currently moves, and as more and more material was pulled together by gravity, the material was heated and it formed a ball. Use the links below for more information.
formed by a volcano many, many years ago.
90 years ago
It is believed that Mars had water on its surface about 4 billion years ago. Evidence such as ancient river valleys, lake beds, and minerals formed in the presence of water suggest that the planet was once much wetter than it is today.
how were the salt mines formed millions of years ago.
About 300 million years ago the continents collided to form the 'supercontinent' of Pangea. It was the PALEOZOIC era.
no, but we think it might have done many millions of years ago
It is believed that lignite was formed about 300 million years ago. It is thought that this old lignite is what produced a lot of the coal that is used in modern times.
jupiter formed 4.5 Billion years ago