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The Spiral Arms, Superplumes, Superchrons and Mass Extinctions
https://naragakuen.repo.nii.ac.jp/records/486
https://naragakuen.repo.nii.ac.jp/records/48603708cc2-b794-47fe-b6d0-c470d91a2d17
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
本文PDF (306.8 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||||||||
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| 公開日 | 2016-08-26 | |||||||||||||||
| タイトル | ||||||||||||||||
| タイトル | The Spiral Arms, Superplumes, Superchrons and Mass Extinctions | |||||||||||||||
| タイトル | ||||||||||||||||
| タイトル | The Spiral Arms, Superplumes, Superchrons and Mass Extinctions | |||||||||||||||
| 言語 | en | |||||||||||||||
| 言語 | ||||||||||||||||
| 言語 | eng | |||||||||||||||
| 資源タイプ | ||||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||
| 資源タイプ | journal article | |||||||||||||||
| 著者 |
藪下, 信
× 藪下, 信
× Anthony J., Allen
× Yabushita, Shin
× Anthony J., Allen
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| 抄録 | ||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||
| 内容記述 | A model is presented which relates the geological and paleonthological events of the past 300 million years to the sun's passage through the spiral arms of the Galaxy. It is an extension of the ideas presented by McCrea, Clube & Napier and Begelma & Rees, and is based on a recent work of Leitch & Vasishit which shows that the sun was most probably in the spiral arms at the times of the well-known Cretaceous-Tertiary and Permian-Triassic boundaries. An argument is presented which relates the accretion of the IS gas cloud onto the sun to the change in the solar luminosity, which in turn brings about the changing rotational period of the earth, whereby the boundary layer between the core and the mantle is disturbed to generate a superplume, which leads to flood basalts at the surface; a superchron of the geomagnetic field is brought to a halt by the greater temperature gradient in the layer. The encounter(s) with IS clouds disturbs the Oort cloud of comets, injecting comets into the inner solar system, some of them becoming earth impactors. It is shown that this model is consistent with geological and palaeonthological data so far known. |
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| 書誌情報 |
情報学フォーラム en : Information Science Forum 巻 2, p. 1-10, 発行日 2003 |
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| 出版者 | ||||||||||||||||
| 出版者 | 奈良産業大学情オフ学部 | |||||||||||||||
