Science 3rd qtr1

Cards (35)

  • mt. pinatubo - one of the composite volcanoes that constitute the Luzon volcanic arc.
  • June 15 1991 - date pinatubo erupted
  • Philippine Institute of Volcanology and seismology- PHIVOLCS
  • 19 eruptions- many times that pinatubo erupted
  • Zambales, Pampanga,Tarlac - provinces that Pinatubo blanketed.
  • Viscosity - resistance to flow of a lava determines how easily gas escapes in the atmosphere
  • Silicic Rocks - rocks that mainly composed of silica (700C)
  • Mafic rocks- deficient rocks that containing silica at 50% lower
  • Explosive and effusive -two types of eruptions
    • explosive eruptions - characterized by gas driven explosion that propels magma and tephra
  • effusive eruptions - eruption which featre the outpouring lava withouy significant explosive eruption.
  • Magmatic,Phreatomagmatic, phreatic eruptions - 3 volcanic eruption according to metatype
  • Hawaiian - eruption named after the Kilauea Volcano.
  • Hawaiian - is the calmnest eruption types
  • Strombolian- eruption driven by the bursting of gas bubbles within the magma.
  • Vulcanian - eruption named after the Italian Island Volcano
  • Hephaestus - vulcan of Romans
  • Vulcanian - explosive eruption that occurs when the pressure of entrapped gases in a relatively viscous magma.
  • Pelean - also called as nuee ardante eruption
  • Peelean - eruption when a large quantity of gas, dust, ash, and lava fragments are blown out.
  • Plinian - most powerful and explosive eruption
  • Surtseyan - eruption named after the islanf of surtseyan off the coast of Iceland.
  • surtseyan - hydro magmatic eruption where magma interacts exposively with water.
  • submarine - type of an eruption that takes place beneath the surface of the water
  • Sublacial eruption - also known as glaciovolcanism which features the interaction between lava and ice often under a glacier.
  • Phreatic eruptions - (steam blast eruption) are those driven by explosive steam resulting from cold ground.
  • Magnitude - energy released by an earthquake
  • Ritcher Scale - use to measure magnitude
  • Intensity - the effect of an earthquake
  • mercalli intensity scale - use to measure intensity
  • volcanic process - refers to the eruptive and non eruptive activities that take place on a volcano.
  • Pahoehoe lava - is a relatively smooth lava flow that cools down forming typical smooth billowy/ ropey surface.
  • A'a Lava - which is characterized by fragmented, rough, sometimes spiny or blocky surface.
  • Clarence Edward Dutton - introduced the Pahoehoe Lava and A'a lava
  • Pyroclastic surge - ground nugging radial cloud that develop along with the eruption column