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30 Cards in this Set
- Front
- Back
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What is viscuous lava?
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thick lava that forms steep slopes
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What is a block mtn and give another name for it.
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It is a block of land raised between two faults and it is also called a horst
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What is a rift valley and give another name for it.
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It is a long,relatively narrow depression formed by sinking a block of land between two parallel faults and it is also called a graben
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Give the 3 types of plate margins.
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converent(destructive)
divergent(constructive) transform(transcurrent) |
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When magma hardens in the vent it is called a..... ?
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pipe/spine/plug
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What is a conelet?
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a small volcano attached to the bigger one
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What is the difference between a sill and a dyke?
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a sill is magma that hardens between rock layers and a dyke is magma that hardens across the rock layers and runs diagonally/slant/inclined
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What kind of volcanic cone is formed when a volcano errupts at different intensities?
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a composite volcano
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Give an example of a crater lake found in the Caribean
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Grand Etang(Grenada)
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Give two examples of block mtns
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Somalia(Western Africa)
Black Forest(Western germany and Switzerland) Otago(New Zealand) Cul-de-sac(Haiti) |
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Give the two types of plates found in the earths crust
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continental(land)
oceanic(water) |
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The Mid-Atlantic ridge(base of ocean) was formed form which plate margin?
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divergent
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Fluid lava is thin and normally spreads out to form what?
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lava plateau
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Give 4 examples of fold mountains
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Himalayas,Alps,Rockies and Andes
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Give two effects of each plate margin
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convergent- earthquake,fold mts
divergent-volcanoes,earthquakes and new land is formed transform-earthquakes and tsunami |
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Give 3 effects of earthquakes
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fires,loss of lives,and loss of property
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Where one plate goes under another, into the mantle it is called a ?
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subduction zone
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When one plate moves on top of the other it forms a what?
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double thickness
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Expalin how volcanoes are formed from convergent plate margins
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This happens when one of the plate margins goes into the mantle and displaces some of the magma causing ot to erupt
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A crack in a volcanoe is also called a what?
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fissure
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A vent in a volcano is also called a what?
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a hole
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Through which one,either the hole or crack,would the pressure be greater?
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the hole
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What is a batholith?
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a big mass of magma.It hardens inside teh earth and it is mainly made up of granite rocks
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What is a laccolith?
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this is an enlargened sill
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Geysers,hot springs, and fumeroles are all evidences of what?
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volcanicity
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Batholith,sill,dyke,laccolith can all be exposed if what takes place?
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erosion
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What is the difference between a geyser and hotspring?
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In a geyser, hot water and gas is present while in the hot springs hot water and little or no gas is present
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What is an earthquake?
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a sudden movement in the earths crust
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What is folding?
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the bending or warping of the earhts crust
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What is a fault?
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a deep crack in the earths crust that allows the escape of magma from inside the mantle
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