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Mountain building (aka Orogenesis) (Types (Shield (effusive eruptions (Eg:…
Mountain building (aka Orogenesis)
Fold
most common
results of collision of tectonic plates
Ocean/continental
Andes
Continental/continental
Himalayan
Volcanic
Heat energy causes
magma to rise
to the surface
released as kinetic energy
Lava
build up around vent
FORMING MOUNTAINS
Gas
Ash
Rocks
Types
Shield
effusive eruptions
Eg: Hawaii
Cinder Cone
with smaller eruptions
Eg: Schanks Mt
Composite (stratovolcanic)
explosive effusive eruptions (andesitic lava)
Eg:Mt Fuji & St Helens
Thermal
heat from magma expands rock
raises land
Ethiopian Plateau
Fault Block
blocks of crust rise due to tension
creates valleys
East Africa Rift Valley
Dome
magma does not reach surface
erosion erodes surrounding areas