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Geology of the islas revillagigedo, mexico
On August 1, 1952, a new volcano named Bárcena was born on Isla San Benedicto, which is located about 300 nautical miles off the west coast of...
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Evolutionary stages of the Banská Stiavnica caldera and its post-volcanic structures
The remains of an extensive volcanic apparatus of the Tertiary « subsequent » volcanism have been identified in the Štiavnické pohoric Mts. in the...
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The eruption of Lopevi, New Hebrides, July 1960
It is interesting to compare the rocks of the 1960 eruption with specimens taken from large blocks situated within the summit crater of Lopevi. The...
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The 1963–65 eruption of Lopevi Volcano (New Hebrides)
The eruption commenced on July 7th 1963 with activity at the summit crater which had been dormant for at least 50 years. Production of lava spatte r...
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Manner of emplacement of pyroclastic andesitic breccias
Heterolithologic, unsorted, non-vesicular, andesitic pyroclastic volcanic breccias have been emplaced by (1) vulcanian or phreatic explosive...
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Volcanicity and Forms of Extrusive Bodies
Extrusive or effusive igneous rocks have consolidated from magma poured out or blown out over the earth’s surface. Two major types of volcanic...