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alum schist

2 senses · Free VividLex dictionary · Thesaurus

1. Alt. of Alum shale Source: opted
2. A variety of shale or clay slate, containing iron pyrites, the decomposition of which leads to the formation of alum, which often effloresces on the rock. Source: webster

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From the definitions

alum shale alt clay containing decomposition effloresces formation iron leads pyrites rock slate variety

Word family

alum root alum shale alum stone

Nearby in the alphabet

altruistic altruistically altruists altyns aludel alula alulae

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