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Silurian
//sɪˈlʊɚ.i.ən//
"Silurian" in a Sentence (1 examples)
In some places, however, quartz reefs, payably auriferous while in Silurian rock, have been followed down to subjacent granite, and have there been found to thin out and become unprofitable […]
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Unscramble this word: silurian