Klerksdorp sphere

English

A Klerksdorp sphere. It is 3 to 4 cm in maximum diameter and 2.5 cm in thickness.

Pronunciation

• Rhymes: -ɪə(ɹ)

Noun

Klerksdorp sphere (plural Klerksdorp spheres)

1. A small object, often spherical to disc-shaped, found in three-billion-year-old pyrophyllite deposits mined near Ottosdal in South Africa, and thought to have originated as concretions in ancient accumulated volcanic sediments or ash.