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Alamagan Volcano is a Quaternary stratovolcano along the Mariana Arc, an active subduction zone in the western Pacific Ocean. Although primarily submerged, its peak reaches above sea level, with subaerially-exposed volcanic deposits dating back through the Holocene to the late Pleistocene. These feature data represent such deposits and other geologic features of Alamagan Volcano, describing its interpreted eruptive history.
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Alamagan Volcano is a Quaternary stratovolcano along the Mariana Arc, an active subduction zone in the western Pacific Ocean. Although primarily submerged, its peak reaches above sea level, with subaerially-exposed volcanic deposits dating back through the Holocene to the late Pleistocene. These feature data represent such deposits and other geologic features of Alamagan Volcano, describing its interpreted eruptive history.
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This data release includes documentation of rock core recovered from three shallow holes drilled during the summer of 2000 into the flanks of Mauna Loa volcano, on the Island of Hawai‘i, Hawaii. Holes were drilled to accommodate installation of U.S. Geological Survey Hawaiian Volcano Observatory volcano-monitoring instruments in the year 2000. Rock core recovered from the holes, which extend 112–119 m (367–392 ft) below the ground surface, were logged to characterize the sub-surface local geology. Core are described by depth below the ground surface, lithologic unit type and class, phenocryst type and abundance, groundmass type, vesicle abundance, morphology, and distribution, alteration, fracturing, and unit contacts....
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Alamagan Volcano is a Quaternary stratovolcano along the Mariana Arc, an active subduction zone in the western Pacific Ocean. Although primarily submerged, its peak reaches above sea level, with subaerially-exposed volcanic deposits dating back through the Holocene to the late Pleistocene. These feature data represent such deposits and other geologic features of Alamagan Volcano, describing its interpreted eruptive history.
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Alamagan Volcano is a Quaternary stratovolcano along the Mariana Arc, an active subduction zone in the western Pacific Ocean. Although primarily submerged, its peak reaches above sea level, with subaerially-exposed volcanic deposits dating back through the Holocene to the late Pleistocene. These feature data represent such deposits and other geologic features of Alamagan Volcano, describing its interpreted eruptive history.
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Alamagan Volcano is a Quaternary stratovolcano along the Mariana Arc, an active subduction zone in the western Pacific Ocean. Although primarily submerged, its peak reaches above sea level, with subaerially-exposed volcanic deposits dating back through the Holocene to the late Pleistocene. These feature data represent such deposits and other geologic features of Alamagan Volcano, describing its interpreted eruptive history.
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Alamagan Volcano is a Quaternary stratovolcano along the Mariana Arc, an active subduction zone in the western Pacific Ocean. Although primarily submerged, its peak reaches above sea level, with subaerially-exposed volcanic deposits dating back through the Holocene to the late Pleistocene. These feature data represent such deposits and other geologic features of Alamagan Volcano, describing its interpreted eruptive history.
thumbnail
Alamagan Volcano is a Quaternary stratovolcano along the Mariana Arc, an active subduction zone in the western Pacific Ocean. Although primarily submerged, its peak reaches above sea level, with subaerially-exposed volcanic deposits dating back through the Holocene to the late Pleistocene. These feature data represent such deposits and other geologic features of Alamagan Volcano, describing its interpreted eruptive history.
    map background search result map search result map Digital database of the geologic map of Alamagan Volcano, northern Mariana Islands Alamagan Volcano - cartographic lines Alamagan Volcano - contacts and faults Alamagan Volcano - data source polygons Alamagan Volcano - geochronologic points Alamagan Volcano - map unit polygons Alamagan Volcano - overlay polygons Core logs from three shallow holes drilled in summer 2000 into the flanks of Mauna Loa volcano, Island of Hawai‘i, Hawaii Alamagan Volcano - geochronologic points Alamagan Volcano - overlay polygons Alamagan Volcano - contacts and faults Alamagan Volcano - map unit polygons Alamagan Volcano - cartographic lines Alamagan Volcano - data source polygons Digital database of the geologic map of Alamagan Volcano, northern Mariana Islands Core logs from three shallow holes drilled in summer 2000 into the flanks of Mauna Loa volcano, Island of Hawai‘i, Hawaii