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Continue to ChatOrigin of minerals in high-ash Jurassic coals and coaly shales, Gümüşhane (NE Turkey) - https://avesis.hacettepe.edu.tr/yayin/d26afa61-2844-4813-977c-847c3e052fca/origin-of-minerals-in-high-ash-jurassic-coals-and-coaly-shales-gumushane-ne-turkey