Ooid

Ooids

Ooids on the surface of an oolite limestone. Carmel Formation (Middle Jurassic) of southern Utah

Thin-section of calcitic ooids from an oolite

An ooid is a small rounded sedimentary rock. Like sand grains, ooids have a diameter of 2 mm or less. Larger grains formed the same way as ooids are called pisoids. Rock made of ooids is oolite.^[1]

Ooid Media

Fossils ooimmured in ooids from the Carmel Formation (Middle Jurassic of southern Utah).

References

↑ "Ooid Sand - Sandatlas". www.sandatlas.org. Retrieved 2022-04-16.

[1] "Ooid Sand - Sandatlas". www.sandatlas.org. Retrieved 2022-04-16.

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