vocab 1-5
define aa
a type of lava flow with a rough, jagged, and bloky surface
define bomb
a mass of molten rock
define crater
a bowl shaped depression
define epicenter
a point on the top of Earths surface
define Hotspot
an intense geological of activity
define ash
the inorganic residue left behind after a sudstance's organic matter
define caldera
a large basin-shaped volcanic depression
define crust
the outside layer of a planet
define fault scarp
a steep cliff-like land form
define lahar
a fast-flowing mud flow
define basement rocks
the ancient, underlying igneous
define cinder
a fragment of volcanic rock that is ejected into the air
define dike
a sheet-like body of rock that forms when magma fills preexisting fracture
define fissure scrape
two distinct concepts
define lapilli
small pebble-like fragments of volcanic mattieral
define batholith
a massive body of intrusive igneous rock
define cinder cone
a simple conical volcano with steep sides
define earthquakes
the sudden shaking of earths surface
define fissure eruption
a volcano eruption were magma flows from a liner crack
define magma chamber
a large underground reservoir of molten rock
define block
a large section of Earth's crust
define composite cone
a large steep-sided volcano built up after long periods of time
define elastic rebound
the process were the Earth's crust bends
define focus
the specific point within the earth where an earthquakes ruptures begins
define magnitude
a measure of the energy released at the source of the the earthquake