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Glossary of Petrography - Rocks, Minerals Terms
beginning with letter B
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basalt Tweet Definition of basalt Like Definition of basalt on Facebook
noun
  1. A hard rock of varied mineral content; volcanic in origin, it makes up much of the Earth's crust.
  2. A type of unglazed pottery.
breccia Tweet Definition of breccia Like Definition of breccia on Facebook
noun
  1. Breccia is typically a rock composed of angular fragments in a matrix that may be of a similar or a different material.
burrstone Tweet Definition of burrstone Like Definition of burrstone on Facebook
noun
  1. A tough, silicify, silicified limestone formerly used to make millstones. It is typified by the presence of multiple cavities that originally housed fossilized shells.

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