Ooid

A thin slice of calcitic ooids from the Carmel Formation, Middle Jurassic, of southern Utah, USA.

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; these 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.

单词	ooid
释义	ooid 英汉-汉英词典鲕粒词组 \| 习惯用语您要查找的是不是： void adj. 空的；无效的；无人的 n. 空间；空虚；空隙 opioid Ⅰadj. 类鸦片(引起)的 Ⅱn. 类鸦片活性肽 Odin n. 欧丁神（北欧神话中的神） ooid n. 鲕粒；鲕状石网络短语: ooid oo 鲕粒 calcareous ooid 钙质鲕粒英语百科 Ooid 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; these 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.
随便看	active carbohydrate active carbon active carbon, activated carbon active carbon adsorption Active carbonCarbo Medicinalis active carbon desulfurization active carbon dioxide active carbon fiber active carbon filter active carbon filter paper active carbon from coal active carbon pneumoconiosis active carbon process active carbon treatment active card active carditis Active carrier active case finding active cassette active castration complex active catalysis surface active catalyst active catalytic center active catch active cathode life

ooid

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网络短语:

Ooid