Ooids (from Ancient Greek ᾠόν (ōión) 'egg stone') are small (commonly ≤2 mm in diameter), spheroidal, "coated" (layered) sedimentary grains, usually composed...

form by direct precipitation of calcium carbonate onto the ooid. Pisoliths are similar to ooids, but they are larger than 2 mm in diameter and tend to be...

coated with a thin layer of crystalline carbonate to form the cortex of the ooid. Compared to other types of sand formation that involve the weathering and...

from ooids, spherical grains composed of concentric layers. Strictly, oolites consist of ooids of diameter 0.25–2 millimetres; rocks composed of ooids larger...

are concretionary grains – typically of calcium carbonate which resemble ooids, but are more than 2 mm in diameter. These grains are approximately spherical...

Calcite cement in an ooid-rich limestone; Carmel Formation, Jurassic of Utah...

service Original issue discount, implicit interest on a discounted debt Ooid, sedimentary grains This disambiguation page lists articles associated with...

constraints on the last aragonite–calcite sea transition from early Jurassic ooids". Facies. 64 (1): 3. Bibcode:2018Faci...64....3V. doi:10.1007/s10347-017-0516-x...

carbonate. Carbonate hardgrounds were thus very common, along with calcitic ooids, calcitic cements, and invertebrate faunas with dominantly calcitic skeletons...

oocyte, oocytogenesis, oogamete, oogamous, oogamy, oogenesis, oogonium, ooid, oolite, oolith, oology, oomancy, oophagy, oophorectomy, oophoron, ootheca...