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A quarry displays a cross section of a debris-avalanche hummock, showing bedded layers of tephra on the right and a segment of a lava flow on the left. Both the the massive lava and the unconsolidated tephra layers were transported relatively intact for about 30 km within a massive debris avalanche from Raung volcano in eastern Java. The preservation of original stratigraphy from within the volcano is a common feature of debris-avalanche deposits.

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