Oolite
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Oolite or oölite is a sedimentary rock formed from ooids, spherical grains composed of concentric layers. Strictly, oolites consist of ooids of diameter 0.25–2 millimetres; rocks composed of ooids lar
Modern ooids from a beach on Joulter Cays, The Bahamas, with 0.5 mm scale
Ooids on the surface of a limestone; Carmel Formation (Middle Jurassic) of southern Utah
Thin-section of calcitic ooids from an oolite within the Carmel Formation (Middle Jurassic) of southern Utah
Ooid
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Ooids are small, spheroidal, "coated" 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 c
Fossils ooimmured in ooids from the Carmel Formation (Middle Jurassic of southern Utah).