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greenstone |
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greenstone 1. any basic igneous rock that is dark green because of the presence of chlorite, actinolite, or epidote 2. a variety of jade used in New Zealand for ornaments and tools greenstone [′grēn‚stōn] (mineralogy) (petrology) Any altered basic igneous rock which is green due to the presence of chlorite, hornblende, or epidote. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The surrounding islands all consist of conical masses of greenstone, associated sometimes with less regular hills of baked and altered clay-slate. |
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