Level 46
Level 47

Extrusive Landforms: Volcanoes


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volcano
a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
pluton
crystalized magma chamber that cooled below the surface (broad term for this intrusion)
batholith
very large mass of intrusive igneous rock
stock
a certificate documenting the shareholder's ownership in the corporation
laccolith
intrusive igneous rx similar to sill... injected magma lifts up overlaying rock layers... results in dome like structure
sill
magma that intruded between horizontal layers and solidifies
lava plateau
a wide, flat landform that results from repeated non-explosive eruptions of lava that spread over a large area
Clay soil
soil that has tiny grains and feels very smooth, holds water well, contains nutrients, many plants cannot grow in this type of soil
cinder cone volcano
a steep, cone-shaped hill or small mountain made of volcanic ash, cinders, and bombs piled up around a volcano's opening
Shield Volcano
fluid lava flows
composite volcano
a tall, cone-shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials
magma
rock so hot that is melted into liquid is called?
Lava
Magma once it is released from the Earth
rhyolitic magma
magma that has a high viscosity and high silica and gas content; eruption tends to be very explosive
basaltic magma
least silica content, least gas content, least viscous, rarely explosive, highest melting temperature, rifts and oceanic hot spots
tephra
ejected solids
pyroclastic flow
a hot, high-velocity mixture of ash, gas and fragmented rock that flows like a liquid down slopes and over terrain.
Lahar
mudflow caused by the melting of the ice/snow of a volcano by lava or the run off of ash downhill caused by rainfall
Ring of fire
Boundaries along the Pacific plate where most earthquake activity occurs
Mauna Loa
shield volcano, makes up large island of Hawaii, tallest mountain on Earth when measured from top to bottom
Level 48