Term
| Give an example of felsic, intermediate and mafic lava. |
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Definition
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Felsic:Rhyolite, Obsidian, Pumice
Intermediate: Andesite
Mafic: Basalt, Scoria
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Term
| Which has a higher silica content? F or M? |
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Definition
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Term
| Which has a higher temp? F or M? |
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Definition
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Term
| Who is more viscous(sticky)?F or M? |
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Definition
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Term
| Who has more dissolved gas?F or M? |
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Definition
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Term
| What type of eruption do felsic and mafic lava have? |
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Definition
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Felsic-Explosive
Mafic-Quiet
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Term
| What is the main eruptive product for F, I, and M? |
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Definition
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Felsic-Pyroclastics
Intermediate-Lava Flows and Pyroclastics
Mafic-Lava flows
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Term
| What is another name for a stratovolcano? |
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Definition
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Term
| What type of volcano do F, I, and M make? |
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Definition
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Felsic-Cinder cones and Stratos
Inter.-Stratos
Mafic-Shields
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Term
| Where are F, I, and M volcanoes found? |
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Definition
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F+I-Oceanic-oceanic and oceanic-continental CONVERGING plate boundaries (subduction zones)
M-DIVERGING plate boundaries and hot spots
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Term
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Definition
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Term
| Why does felsic magma create a loud eruption? |
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Definition
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Because it is viscous and plugs up the hole, creating higher pressure and causing an explosion.
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Term
| What makes up pyroclastics? |
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Definition
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Term
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Definition
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Piece of lava thrown into air during explosive eruption that patly solidifies and falls to the ground where it usually "blows up" because it is not full solid.
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Term
| How often does Olympus Mons erupt? |
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Definition
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Never anymore, b/c Mars is dead inside(no hot inner core to make magma).
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Term
| What type of volcaoes are the most famous ones? Give examples. |
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Definition
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Stratovolcanoes. Fujiyama, Vesuvius, Etna, Krakatoa, St. Helens.
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Term
| Where are volcanoes found on Earth? |
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Definition
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Edge of plates, Ring of Fire, Hot Spots
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Term
| What is a hot spot and give an example. |
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Definition
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A hot spot is a place where magam can get closer to the surface than usual. Hot spots don't move. Ex. Hawaii and Yellowstone.
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Term
| What is dormant and what is extinct? |
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Definition
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If it has exploded within human recorded history it is dormant, if it hasn't, it is extinct.
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Term
| Describe cinder cones and give two examples. |
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Definition
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Cindercone volcanoes are small and results of explosive eruptions. Steep-sided cone or relatively loose pyroclastics. Ex. Paricutan, Sunset Crater
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Term
| Describe Shield volcanoes and give two examples. |
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Definition
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Result of repeated quiet eruptions with wide lava flows. Broad mountain much wider than tall. Tallest volcanoes. Composed primarily of basaltic flows. Ex. Olympus Mons, Hawaiian Islands
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Term
| Describe Stratovolcanoes(composite cones) and give 2 examples. |
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Definition
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Most well-known and scenic. Composed of flows interlayered w/ pyroclastics. Medium height, cone steepens towards vent. Ex. Mt. Fujiyama, Mt. St. Helens,
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Term
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Definition
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A small organism that lives in very, very hot places. Like the edge of a mud pot. They are very brightly colored(the different colors indicating different species) which makes some people call mud pots, paint pots.
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Term
| More earthquakes in bigger magnitude and closer together means... |
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Definition
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...that the magma is getting closer to your feet and a volcano eruption is probably coming.
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Term
| What are pyroclastic flows? |
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Definition
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fast-moving fluidized bodies of hot gas, ash, and rock which can travel up to 700 km/h and reach 500-1000 C
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Term
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Definition
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Large amount of intrusive igneous rock that can from mountains and ridges.
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Term
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Definition
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Intrusive igneous rock that has intruded IN BETWEEN layers or floiations of other rocks.
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Term
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Definition
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Intrusive igneous rock that has intruded BETWEEN layers of sedimentary rock.
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Term
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Definition
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Intrusive igneous rock that CUTS ACROSS layers or foliations of other rocks.
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Term
| Is California younger or older than the rest of the US? |
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Definition
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Term
| What is a hydrothermal vent? |
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Definition
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A fissure in the crust's surface from which geothermally heated water issues.
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Term
| What happens when you inhale volcanic ash? |
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Definition
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It combines with the moisture in your lungs to form a cement-like mixture that can easily kill you.
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Term
| Do earthquakes in Yellowstone cause a lot of landslides? |
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Definition
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Term
| What makes magma eruptable? |
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Definition
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It is under a lot of pressure and is very hot.
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Term
| What powers Yellowstone's geysers? |
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Definition
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Term
| What is a harmonic tremor? |
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Definition
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Earthquakes occuring together at the same frequency, which makes them more powerful. (It helps to think of people singing in harmony; they are louder than just one person)
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Term
| What are red and gray eruptions? |
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Definition
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A red eruption is quiet, a gray eruption is explosive.
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Term
| What is the main constituent of volcanic gases? |
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Definition
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Term
| What is the most active volcanic planet inthe solar system? |
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Definition
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Term
| What is the most active volcanic body in the solar system? |
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Definition
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Term
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Definition
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Igneous rock formation that forms when a volcano becomes extinct and the magam in the pipe connected to the vent cools and solidifies.
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Term
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Definition
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A volcanic pipe who has had its surroundings erode away because they were not as resistant to the erosion.
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Term
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Definition
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A small(less than 1 km in diameter) lava vent fromed from a volcano.
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Term
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Definition
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A large (more than 1 km in diameter) lava vent produced by a volcano.
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Term
| What kind of volcano is/was Krakatoa? |
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Definition
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