Coastal & Marine Geology InfoBank

USGS CMG InfoBank: Why We Find Few Craters on Earth


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Comment: 07:56 - 08:17 (00:21)

Source: Annenberg/CPB Resources - Earth Revealed - 2. The Restless Planet

Keywords: "impact crater", crater, Earth, erosion

Our transcription: This Canadian crater seen from space is over 60 kilometers across.

Lakes fill the troughs near its rim.

But unlike the rest of the planets, erosion and sedimentation have removed the craters of most impact sites on Earth.

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Accessibility FOIA Privacy Policies and Notices
U.S. Department of the Interior \| U.S. Geological Survey URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/02.01.14.html Page Contact: InfoBank staff Page Last Modified: Fri Sep 18 02:35:34 PDT 2009 (wcs)