English Explanatory Dictionary

Klerksdorp sphere

English dictionary entry

Meanings

noun
  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.

Word forms

Klerksdorp sphere Klerksdorp spheres
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