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Bookmark or Share- Meteorite Impact Craters - Geophysical InstituteThe Arizona meteorite survived its trip through the atmosphere even though it was small because it was composed of iron rather than stone. The Arizona crater is about 0.7 miles across. The impact record of the earth includes such small features only if they are very young, as is this particular crater.
- The Savonoski Problem - Geophysical InstituteSavonoski Crater is about 500 meters (1600 feet) across, the lake inside is 50 meters deep and the rim rises up to 60 meters above the water. Despite the superficial appearance of being a meteorite crater, extensive investigation by geophysicists failed to find evidence linking Savonoski to a meteoritic origin.
- Alaskan Meteorites - Geophysical InstituteThe other two are the Savonoski Crater, roughly 500 meters across, in Katmai, and a small one only 63 meters across on Amak Island north of the Alaska Peninsula. Dr. Juergen Kienle of the Geophysical Institute notes that the Amak crater might be a maar rather than a meteorite crater.
- Century-old blast still a mystery - Geophysical InstituteOne of them is Avak impact crater near Utqiaġvik. Millions of years ago, a meteorite or comet the diameter of downtown Fairbanks crashed into the shallow ocean that covered northern Alaska. It left behind a steaming crater six miles from rim to rim. Geologists Florence Weber and Florence Collins discovered Avak in the 1950s.
- Alaska's Deep Impact on the North Slope | Geophysical InstituteSeveral hundred feet of sediment covered Avak in the last million years, hiding the crater from view. Geologists know the crater exists because it’s revealed in the core samples and seismic and other geophysical surveys. Avak was born when a meteorite or comet the diameter of downtown Fairbanks crashed into northern Alaska millions of years ago.
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