地質年代の記事

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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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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Magnetic stripes are the result of reversals of the Earth's field and seafloor spreading. New oceanic crust is magnetized as it forms and then it moves away from the ridge in both directions. The models show a ridge (a) about 5 million years ago (b) about 2 million years ago and (c) in the present.[1]

古地磁気学が解き明かす地球の歴史とプレートテクトニクスの謎

古地磁気学地磁気逆転プレートテクトニクス海嶺

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