| About 450 million years ago, a meteor struck north-central Oklahoma, creating an impact crater - an astrobleme - more than eight miles wide. |
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| The town of Ames is now located in the center of this crater, also known as an astrobleme. |
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| It seemed a prime suspect as an astrobleme created by recoil uplift following a hypervelocity asteroidal impact. |
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| A well-known older astrobleme situated in the margin of the Mesoprotozoic Superior craton provides a good example of meteorite fall. |
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| Lake Manicouagan lies in an astrobleme in central Quebec covering an area of approximately 1206 square miles. |
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| Vredefort Dome, approximately 120km south west of Johannesburg, is a representative part of a larger meteorite impact structure, or astrobleme. |
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| Zhamanshin astrobleme provides evidence for carbonaceous chondrite and post-impact exchange between ejecta and Earth's atmosphere. |
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| Dating back 2.023 million years, the Dome is the oldest astrobleme still visible on earth and site of the world's greatest known single energy release. |
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| There remains little doubt but that, when shatter cones can be identified with certainty, they are a valid and definitive criterion for an astrobleme. |
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| It is the world's only structurally intact exposure of the basement, below the crater floor, of a very large astrobleme. |
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| Dating back 2023 million years, Vredefort Dome is not only the oldest astrobleme found on Earth so far but also the largest, with a radius of 190 km, and the most deeply eroded. |
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| It provides the only mappable and restorable profile that illustrates the genesis and development of an astrobleme during the very short time after impact. |
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