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地質時代

20 件の記事

The Grand Canyon, Arizona, in March 2013

地質学の基礎地球の構造から歴史、調査手法まで

地質学プレートテクトニクス岩石サイクル地層
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The Permian through Jurassic strata of the Colorado Plateau area of southeastern Utah demonstrate the principles of stratigraphy.

地層学の基礎と手法地球の歴史を読み解く地質学的アプローチ

地層学層序学地質学化石
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原生代地球の歴史を塗り替えた最長の地質時代

原生代地質時代大酸化イベント真核生物
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Eras of the Phanerozoic each represented by characteristic developments

顕生代生命が爆発的に多様化した地球の歴史

顕生代古生代中生代新生代
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Vegetation and water bodies in northern and central Africa in the Eemian (bottom) and Holocene (top)

完新世現代へと続く地球の気候変動と人類の歩み

完新世地質時代気候変動氷河期
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Geologic time scale proportionally represented as a log-spiral. The image also shows some notable events in Earth's history and the general evolution of life.

地質年代学地球46億年の歴史を刻む時間尺度

地質年代地層年代測定層序学
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Weathered Precambrian pillow lava in the Temagami Greenstone Belt of the Canadian Shield

先カンブリア時代地球誕生から生命の躍動までを辿る

先カンブリア時代地質時代冥王代太古代
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Backscatter electron micrograph of detrital zircons from the Hadean (4.404 ± 0.008 Ga) metasediments of the Jack Hills, Narryer Gneiss terrane, Western Australia

冥王代（ハデアン）の地球誕生から生命の萌芽まで

冥王代ハデアン地球の歴史ジルコン
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The evolution of Earth's radiogenic heat flow over time

太古代（Archean）の地球生命の誕生と激動の環境

太古代地質時代初期地球ストロマライト
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Geologic time scale proportionally represented as a log-spiral. The image also shows some notable events in Earth's history and the general evolution of life.

地質年代学地球46億年の歴史を刻むタイムスケールの仕組み

地質年代地層年代測定年代層序学
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Schematic cross section of image at left. Surface units are interpreted as a sequence of layers (strata), with the youngest at top and oldest at bottom in accordance with the law of superposition.

ヘスペリア紀火星の環境を激変させた火山活動と大洪水

火星ヘスペリア紀地質時代火山活動
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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
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