radiohalo

radiohalo
A microscopic spherical disturbance in a rock caused by a grain of radioactive material.

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  • Radiohalo — Radiohalos are microscopic, spherical shells of discolouration in rocks, such as granite, or biotite caused by the inclusion of radioactive grains in the rock or by deposition of radioactive material in them. One widely accepted theory is that… …   Wikipedia

  • radiohalo — |rādē(ˌ)ō+ noun Etymology: radio + halo : a halo usually of microscopic dimensions in a mineral or a rock produced by radioactive emanations from an included small grain of some other mineral * * * radiohalo, heliograph see radio 3 a, 4 …   Useful english dictionary

  • radiohalo — ra·dio·halo …   English syllables

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