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クレーター計数法

4 件の記事

HiRISE image illustrating superpositioning, a principle that lets geologists determine the relative ages of surface units. The dark-toned lava flow overlies (is younger than) the light-toned, more heavily cratered terrain (older lava flow?) at right. The ejecta of the crater at center overlies both units, indicating that the crater is the youngest feature in the image.

アマゾニアン時代火星の最新地質時代とその環境

火星アマゾニアン地質時代アマゾニス平原
MESSENGER image of secondary craters surrounding a primary impact site.

二次クレーターの形成メカニズムと惑星科学における重要性

二次クレーター一次クレーター惑星科学放出物
An irregular mare patch in the Mare Tranquillitatis. Note that the image may appear depth inverted; the large round object in the upper right corner is a crater and the large round object in the center is a dome.

不規則海パッチ(IMP)が明かす月の地質学的謎

不規則海パッチIMP月面地質学
Shield volcano in Tharsis region on Mars with marked borders, circles represent impact craters counted by crater counting method.

クレーター計数法による惑星表面の年代測定

クレーター計数法惑星科学年代測定二次クレーター