Eonothem

Horseshoe Canyon Formations exposed in Horseshoe Canyon near Drumheller, Alberta.

Oxfordian (Upper Jurassic) cyclic sediments at Péry-Reuchenette, near Tavannes, kanton Bern, Switzerland. Alternating layers are limestone (light, more competent) and marl/clay; dominant cycle is the 200000 year-cycle.

In stratigraphy and geology, an eonothem is the totality of rock strata laid down in the stratigraphic record deposited during a certain eon of the continuous geologic timescale. The eonothem is not to be confused with the eon itself, which is a corresponding division of geologic time spanning a specific amount of (millions of) years, during which rocks were formed that are classified within the eonothem. In practice, the rock column is discontinuous:

单词	eonothem
释义	eonothem 英汉-汉英词典宇词组 \| 习惯用语您要查找的是不是： anthem n. 赞美诗；圣歌 vt. 唱圣歌庆祝；唱赞歌 theorem n. 定理；原理 monotone n. 单调；单音调 adj. 单调的 anathema n. (天主教的)革出教门;诅咒令人极其讨厌的事被基督教诅咒的人或事 monotheism n. 一神论；一神教 eonothem 宇网络短语: PHANEROZOIC EoNOTHEM 显生宇 cryptozoic eonothem 隐生宇英语百科 Eonothem In stratigraphy and geology, an eonothem is the totality of rock strata laid down in the stratigraphic record deposited during a certain eon of the continuous geologic timescale. The eonothem is not to be confused with the eon itself, which is a corresponding division of geologic time spanning a specific amount of (millions of) years, during which rocks were formed that are classified within the eonothem. In practice, the rock column is discontinuous:
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eonothem

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网络短语:

Eonothem