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greenstone

greenstone

8.8
A green volcanic rock changed by heat and pressure in very old ground
  • noun
  • /ˈɡriːnstoʊn/
  • Specialized
translation icon : roca verde
  • Many ancient tools were carved from greenstone, showcasing the resource's significance in prehistoric times.

Examples

  • There's a greenstone belt that goes through all these different countries.

    Blog text (17)
  • Geologists believe that the presence of greenstone indicates ancient volcanic activity in the region.

  • The more greenstone belt, the more exploration potential for a country.

    Blog text (17)
  • This influence resulted in the substitution of metal tools for blades of greenstone and obsidian.

    Academic text (1991)
  • One up-and-comer, although it doesn't hold as much of the greenstone belt, is Sierra Leone.

    Blog text (17)
  • The discovery of greenstone formations has led researchers to explore the geological history of the area.

Surface Forms

greenstone singular
greenstones plural

Morphology

greenstone = green + stone (semi-transparent) = green + stone

The components signal a green rock, but the full sense includes technical geological properties that go beyond simple compounding.

Etymology

The word greenstone comes from the parts green and stone because tiny green minerals make the rock look green. Scientists who study rocks call some old volcanic rocks 'greenstone' for this colour, so the name now points to these ancient green rock formations.