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.
This article is issued from Wiktionary. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.