| タイトル | The chronology of the martian volcanoes |
| 著者（英） | Saunders, R. S.; Plescia, J. B. |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech.|University of Southern California |
| 発行日 | 1979-01-01 |
| 言語 | eng |
| 内容記述 | The volcanoes of Mars have been divided into three groups based on morphology: basaltic shields, domes and composite cones, and highland patera. A fourth group can be added to include the volcano-tectonic depressions. Using crater counts and the absolute chronology of Soderblom, an attempt is made to estimate the history of the volcanoes. Early in the martian history, about 2.5 b.y. ago, all three styles of volcanoes were active at various locations on the surface. At approximately 1.7-1.8 b.y. ago a transition occurred in the style and loci of volcanic construction. Volcanoes of younger age appear to be only of the basaltic shield group and are restricted to the Tharsis region. This same transition was noted by a change in the style of the basaltic shield group. Older shields were small low features, while the younger shields are significantly broader and taller. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 80A23724 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/422866 |
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