Questions tagged [meteorite]

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34
votes
3answers
15k views

Why is Earth's age given by dating meteorites rather than its own rocks?

Reading a course on Precambrian, I read that: Earth Age (around 4.5 billion years) is dated thanks to the meteorites hitting Earth during its formation rather than the inner materials composing the ...
-3
votes
1answer
2k views

Safest spots when an asteroid hits? [closed]

I am breaking this question and no longer making an effort in refining it with the exception of adding an associated link with the scenarios. I always wondered if a devastating asteroid was ...
16
votes
1answer
1k views

Impact craters under water

What would be the resulting impact crater of a meteorite hitting bodies of water on Earth? Let's take for example the impactor that resulted in Meteor Crater, Arizona. What would the impact look like ...
16
votes
1answer
2k views

Can impact events cause widespread volcanic activity on the other side of the planet?

The currently accepted theory for P-T mass extinction is environmental change triggered by the Siberian Traps volcanic activity. A paper(1) suggests that the Siberian Traps were caused by a hotspot ...
12
votes
1answer
834 views

How deep was the Vredefort Crater when it happened?

The Vredefort Crater is one of the biggest known impact craters on earth. How deep would it have been, relative to the original ground height, immediately after the dust settled, and before any ...
11
votes
3answers
348 views

Water on Mars and Earth

If water on Earth came from meteorites, why doesn't Mars have substantial water? What made it more highly probable on Earth than on Mars?
2
votes
0answers
74 views

Have "frosty meteorites" ever been observed soon after landing? Are there photos?

This answer to Would a gold-containing meteor cause it to “rain” gold? says (in part): Meteors, when in space, are very very very very cold. Their travel duration in Earth's atmosphere is very short, ...
0
votes
1answer
146 views

Does being in the air provide any protection from an asteroid?

How does radiation and shock waves from a radioactive asteroid or atomic explosion disperse throughout Earth's atmosphere? Are there specific areas on Earth that are less likely to receive the shock ...
17
votes
2answers
2k views

What temperature do small meteorites have on impact

A question which has haunted me for years. What temperature do small meteorites (which don't evaporate on impact) have if you find them immediately after they hit the surface. I understand that the ...
7
votes
2answers
224 views

Would a gold-containing meteor cause it to "rain" gold?

Not sure if here or physics is the best place for this question, but if there was a meteor that had gold in it, what happens to that metal during entry of the Earth's atmosphere? Since gold melts at ...
5
votes
1answer
334 views

Is it possible to estimate the size of a meteorite from its remains?

I live near this ophiolite (Sasso di San Zanobi, Firenzuola) and they used to say it is a meteorite. There is no evidence of a crater but let's pretend it is the remain of a meteorite: how big would ...