Relative dating lab


13-Aug-2020 02:28

The heavy bombardment of about 3.8 billion years ago must be taken into account when using the crater age dating technique.For example, the highland regions on the Moon have ten times the number of craters as the maria, but radioactive dating (explained in the next chapter) shows that the highlands are approximately 500 million years older than the maria, not ten times older.Volcano craters are above the surrounding area on mountaintops while the craters from impacts are below the surrounding area with raised rims.The craters on all of the moons except Io, Mercury, and most of the ones on Mars are from impacts.

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The size of the craters having central peaks depends on the gravity of the planet or moon: on the Moon craters larger than about 60 kilometers in diameter have central peaks while the crater diameter on the Earth needs to be larger than just 1 to 3 kilometers.Select the image to go to the Selene website for a great flyover of the crater.



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