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Igninbrita

Igninbrita bat.

Igninbrita pikor ez kontsolidatuz osatutako arroka igneo bat da, errautsaz sorturikoa, fluxu piroklastikoetan sortzen dena. Orokorrean dazita edo erriolitaren konposaketa bera izaten dute.

Igninbrita batez ere tefra matrizez osatua dago, shard eta sumendi beiraz osatua. Pumita eta kristal zatiak ere daude osaeran. Erautsa matrizearen barnean, batzuetan legar tamainako arroka zatiak daude, xenolitoak edo inklusioak.

Kanpo estekak


Geologia Artikulu hau geologiari buruzko zirriborroa da. Wikipedia lagun dezakezu edukia osatuz.

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