Volcanic Material
What is the difference between aa and pahoehoe lava?
Pahoehoe has a smooth surface and Aa lava is rough
The 2 ways volcanoes grow are?
Intrusion and Extrusion
what is Vulcanian?
bursts of dark ash lava steam and gases
what is the mid atlantic ridge?
one large plate boundarie
what is a volcano?
a vent in the earths crust
Volcanic bombs are?
blobs of molten rock launched into the air
Divergent plates form volcanoes by?
Plates moving away and magma rising up
what is a cinder cone?
a small cone shaped volcano made out of ash
volcanic islands are apart of an?
ark shaped group
what is pyroclast?
a solid volcano material
Pluton is?
A body of magma that hardened underground
Volcanic soil is rich in?
Minerals
An alive volcano?
volcanic islands are produced by?
plate collisions
what is a hot spot?
a place on the earths surface that is directly above rising magma
Volcanic ash does not dissolve in?
water
Most volcanoes form at?
At the boundaries of tectonic plates
what is a shield volcanos?
a gently sloping volcano
where do subduction zones occur?
where oceanic plates meet
what is a volcanic bomb?
a fragment of molten rock that is shot up in the air
Volcanic ash is made of?
Finely crushed pumice fragments
What is a Volcano?
A vent in the earths crust
What are the three categories of volcanos?
alive extinct and dormant
where do most volcanoes occur?
along plate boundaries
what is a tiltmeter?
an instrument that uses liquid to register changes in the earth