Wiktionary英語版

出典:Wiktionary

ooid

出典:『Wiktionary』 (2026/03/08 18:13 UTC )

語源

From oo- (egg) +‎ -id.

発音

名詞

ooid (plural ooids)

  1. (geology) A small calcium carbonate- or iron-coated grain found on the seafloor.

同意語

  • oolith

派生語

参考

形容詞

ooid (comparative more ooid, superlative most ooid)

  1. Shaped like an egg; ovoid; ovate.

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ウィキペディア英語版

出典:Wikipedia

Ooid

出典:『Wikipedia』 (2010/11/26 00:16 UTC 版)

英語による解説

ウィキペディア英語版からの引用
引用

Ooids are small (< 2 mm in diameter), spheroidal, "coated" (layered) sedimentary grains, usually composed of calcium carbonate, but sometimes made up of iron- or phosphate-based minerals. Ooids usually form on the sea floor, most commonly in shallow tropical seas (around the Bahamas, for example, or in the Persian Gulf). After being buried under additional sediment, these ooid grains can be cemented together to form a sedimentary rock called an oolite. Oolites usually consist of calcium carbonate meaning they belong to the limestone rock family. Pisoids are similar to ooids, but are larger than 2 mm in diameter, often considerably larger, as with the pisoids in the hot springs at Carlsbad (Karlovy Vary) in the Czech Republic.

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