Slugger O'Toole

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Asteroid Impact Craters on Earth

Thu 13 August 2009, 7:08pm

Clearwater LakesVia the Professor. Wired has some stunning images of Earth’s old scars – “Asteroid Impact Craters on Earth as Seen from Space”. Including the approximately 290 million years old pair of impact craters that form Clearwater Lakes, Quebec. The larger crater measures 22 miles across. Image: NASA. And A related New Scientist report.

And, also in Canada, here’s a photo of the eroded remains of the 43-mile wide Manicouagan Crater formed approximately 210 million years ago by the impact of an asteroid thought to have been about three miles wide. Image: NASA, STS 9 Crew, 1983.

Manicouagan Crater

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Comments (3)

  1. lamhdearg (profile) says:

    sorry pete, finish us, did the one’s in your link finish the large creatures that may have been living on earth at the time ( it’s a sunday, so i wont say the d word).

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  2. Lamhdearg,

    I could not tell you about the impact of these craters seen on the image but the sizes of the craters involved probably give some clue.

    The 43 mile wide crater indicates a pretty devasting asteroid but not as devasting as the one which is believed to have killed the dinosaurs and most other living creatures 65 million years ago. It is further believed that the latter asteroid caused the crater at New Mexico said to be 180 kilometres in diameter (that is 112miles)

    http://en.wikipedia.org/wiki/Chicxulub_crater

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  3. Pete Baker (profile) says:

    lamhdearg

    “did the one’s in your link finish the large creatures that may have been living on earth at the time”

    Not those ones.

    The particular one [or two] that did for “the [much later] large creatures” was much bigger.

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