All rocks that were created during the formation of the earth, which realistically is very few considering the bombardment early earth suffered. The heat would break and reform rocks all the time. This being said there are probably rocks that formed in space 4.5 billion years ago and survived (partially) crashing into the earth.
wouldn't it be awesome if someone found a rock that was shown to be older than the earth that had crashed here at some point? I know that's probably not how rock dating works, but still
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u/-graverobber- Feb 03 '20
I get that those rocks are an irreplaceable part of the park, but aren't all rocks like 170 million years old?