| タイトル | Impacts, extinctions, volcanism, glaciations, and tectonics: Matches and mismatches |
| 本文（外部サイト） | http://hdl.handle.net/2060/19940023795 |
| 著者（英） | Dalziel, I. W. D. |
| 著者所属（英） | Texas Univ. |
| 発行日 | 1994-01-01 |
| 言語 | eng |
| 内容記述 | The debate concerning possible reactions between impacts, extinction events, and volcanism has recently taken a new turn. Diamictites and associated sedimentary deposits long regarded by geologists as glaciogenic, have been reinterpreted as impact-related. Going further, the Permo-Carboniferous diamictites that are widespread in the southern continents and India are not put forward as evidence that fragmentation of the Gondwana supercontinent in the Mesozoic was a direct result of meteorite impact. In an abstract at a meeting of the American Geophysical Union, and in an article in the popular press, one member of the earth science community has made a specific claim to identify the site of the supercontinent-destroying bolide on the Falkland/Malvinas Plateau. It is claimed by this scientist that the Cape Fold belt in Africa represents a 'breaking wave' of deformation resulting from this impact, and that fractures in the clasts of the Dwyka diamictite in southern Africa represent impact-induced cataclasis of the target rock. These hypotheses fly in the face of the well-established tectonic history of the Gondwana supercontinent in several respects. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 94N28298 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/112936 |
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