"The deeply dissected, dominantly andesitic-to-dacitic Mandalagan volcanic complex on northern Negros Island contains a vigorous solfataric area at a highly altered domed structure. The complex consists of seven volcanic centers, including at least five craters and/or calderas up to 2 km in diameter. One solfataric area emits a high-temperature (106 degrees C) plume to 30 m height with a roaring noise like a high-pressure geothermal borehole. The age of the most recent eruptive activity at the 1885-m-high volcano, which produced a thin basaltic lava flow, is not known."  -Smithsonian Volcano Archive
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