It developed a magic womb, which burst open one day to produce a stone egg about the size of a ball.
因见风,化作一个石猴。五官俱备,四肢皆全。
英语百科
Oolite
Oolite (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 diameter 0.25–2mm; rocks composed of ooids larger than 2mm are called pisolites. The term oolith can refer to oolite or individual ooids.