DRRR

• Volcanoes


  Formed from previous explosions where ash, molten rocks, and gus mountains and craters
• Main vent


  • Main tube that connects the magma chamber to the surface
• Lava


  Molten rock after it reaches the surface
• Secondary cone


  • A vent that builds up around secondary vents
• Secondary vent


  • Place where magma reaches the surface without going through the main vent
• Magma


  Molten rock still underneath the volcano
• Magma chamber


  Stores the magma
• Lahar


  Indonesian term for a combination of debris/mud mixed with volcanic materials
• Ashfall


  Composed of bits of pieces of pulverized rock, minerals, and volcanic glass
• Pyroclastic flow


  • Fast-moving fluidized mass of rock fragments and gases at high temperature
• Ballistic projectile


  • Rock fragment ejected, including bombs (molten rock fragments) and blocks (solid rock fragments)
• Volcanic gas


  Includes sulfur dioxide and hydrogen sulfide, hazardous to organisms
• Lava flow


  • Molten rock that flows down the slope of the volcano, denser than pyroclastic flow, slower
• Landslide


  • Movement of land on an inclined surface, caused by rains, flood, wind
• Sinkhole


  • Large pits resulting from the collapse of the surface, only occurs in soils containing limestone
• Abney level


  • Laser rangefinder that computes the slope of the surface and strength of soil layers
• Ground-penetrating radar (GPR)


  • Validates sinkholes, provides imagery of the composition of the subsurface ground, detects spaces and estimates their size
• ash clouds - can travel farther and cover a larger radius
• microclimate -longterm atmospheric condition shared by a small region
• Asphyxiation - described by britannica, is a suffocation or difficultu in breathing caused by deprivation of oxygen
• blocks - solid rock fragments
• bomb - molten rock fragments