Stratovulkan
Stratovulkan eller keglevulkan er den mest kendte type af vulkaner. En stratovulkan er opbygget af mange lag (latin pl.: strata) af lava. Stratovulkaner er typiske i subduktionszoner, hvor to kontinentalplader støder sammen. Den har mere stejle skråninger og en mere tyktflydende lava end f.eks. skjoldvulkaner. Keglevulkaner har også et meget voldsomt gas-, røg- og askeudslip, som kan være farligt. Eksempelvis dækkede stratovulkanen Vesuv den romerske by Pompeji med aske.
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Mount St. Helens and the devastated area is now within the 110,000-acre Mount St. Helens National Volcanic Monument, under jurisdiction of the United States Forest Service. Visitor centers, interpretive areas, and trails are being established as thousands of tourists, students, and scientists visit the monument daily. Mount St. Helens is once again considered to be one of the most beautiful and interesting of the Cascade volcanic peaks.
Mount St. Helens and the devastated area is now within the 110,000-acre Mount St. Helens National Volcanic Monument, under jurisdiction of the United States Forest Service. Visitor centers, interpretive areas, and trails are being established as thousands of tourists, students, and scientists visit the monument daily. Mount St. Helens is once again considered to be one of the most beautiful and interesting of the Cascade volcanic peaks.
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Structure of a stratovolcano.
Structure of a stratovolcano.