切薩皮克灣隕石坑
切薩皮克灣隕石坑(英語:Chesapeake Bay impact crater)是因隕石撞擊所形成的地質構造,位在北美洲,直徑約40公里,平均深度1.3公里,外圍環繞的同心圓狀的斷層,使整個坑體的規模達到直徑83公里。據推測,撞擊事件發生於始新世晚期,距今約3千五百五十萬年前。切薩皮克灣隕石坑是美國本土已知規模最大的撞擊構造,同時也是全世界少數幾個形狀完好、適合作為地質研究對象的水底隕石坑。隕石坑形成後,堆積作用持續將沉積物堆積在坑體上,形成了今日的切薩皮克灣。
參見
文獻
- Poag, C. Wiley. Chesapeake Invader: Discovering America's Giant Meteorite Crater. Princeton, NJ: Princeton University Press, 1999. ISBN 0-691-00919-8
外部連結
- A brief introduction to the Chesapeake Bay Impact Crater.
- USGS, 'Investigating the Chesapeake Bay Impact Crater.'
- USGS, 'The Chesapeake meteorite: message from the past.'
- 'The Chesapeake Bay bolide: modern consequences of an ancient cataclysm.' (页面存档备份,存于互联网档案馆)
- Earth Impact Database, (页面存档备份,存于互联网档案馆) a website concerned with over 160 identified impact craters on the Earth.
- Satellite image of the region (from Google Maps)
- Chesapeake Bay Impact Structure Deep Drilling Project
- 'North American Plate, mid-Atlantic Inversion a result of the Chesapeake Invader?' (页面存档备份,存于互联网档案馆) www.impacttectonics.org