Oolitic Limestone | Info

Oolite or oölite ( egg stone ) is a sedimentary rock formed from ooids , spherical grains composed of concentric layers. The name derives from the Ancient Greek word ᾠόν for egg . Strictly, oolites consist of ooids of 0.25–2 millimetres' diameter; rocks composed of ooids larger than 2 mm are called pisolites . The term oolith can refer to oolite or individual ooids.