Geology Questions
Explore questions in the Geology category that you can ask Spark.E!
The opening in Earth's surface through which a volcanic eruption takes place.
______% of the world's earthquakes and _____% of the world's largest earthquakes occur along the Ring of Fire.
calm oozing of magma out of the ground produces lava flows; A volcanic eruption characterized by the outpouring of lava.
• Broad and gently sloping.• Composed of solidified basaltic lava flows.• Flows often contain lava tubesBroad, gently sloping cone constructed of solidified lava flows
.... eruptions are passive, not explosive
low viscosity and flows easily• Pahoehoe, A'a, Lava Tube
Large spindle- or lens-shaped pyroclast.
Fine pyroclasts (less than 4 millimeters)
Pyroclast approximately the size of a sand grain. Sometimes defined as between 4 and 32 millimeters in diameter.
A lava flow that solidifies with a spiny, rubbly surface.
produced by condensation of volcanic water vapor.
Volcanic activity, including the eruption of lava and rock fragments and gas explosions; occurs when magma makes its way to the Earth's surface
size ranges from dust (ash) to boulders (blocks and volcanic bombs)
A volcanic eruption characterized by the violent ejection of pyroclastic material.
both positively and negatively influenced by volcanism.
An index used to measure, on a scale of 1-10, the power of a volcanic eruption.
produced when magma reaches Earth's surface
Turbulent mixture of pyroclastics and gases flowing down the flank of a volcano.
Large amounts of ash and volcanic gases in atmosphere can trigger rapid ..... and contribute to .......
The ring of fire has ___________ volcanoes and is home to over ____% of the world's active and dormant volcanoes.