Grus, disintegrated granitic rock, Montana https://geologypics.com/wp-content/uploads/2017/07/geology-pics.png 0 0 Marli Miller https://geologypics.com/wp-content/uploads/2017/07/geology-pics.png Marli Miller2017-11-12 11:27:212017-11-25 21:11:18Grus, disintegrated granitic rock, Montana
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