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fragmental igneous rock

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definition Igneous rock in which greater than 75 percent of the rock consists of fragments produced as a result of igneous rock-forming process. Includes pyroclastic rocks, autobreccia associated with lava flows and intrusive breccias. Excludes deposits reworked by epiclastic processes (see Tuffite) more like this
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in scheme simplelithology original
is primary topic of fragmental_igneous_rock
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broader fragmental_igneous_rock original