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Plate Tectonics (Hot spots (volcanoes # (shield volcano (hawaii),…
Plate Tectonics
Hot spots
volcanoes
#
cinder cone
shield volcano
hawaii
composite cone/ stratovolcano
mt. st. Helens
mountains
#
rocky mountains
islands
#
oceans
boundaries
Divergent
crust moves away from each other
new crust is formed
causes earthquakes and some volcanos
Convergent
moves towards each other
three types of convergent boundaries
oceanic-continental
volcanoes
oceanic-oceanic
islands
continental-continental
mountains
Transform
Two plates slide past each other
Many effects of plate boundaries
earthquakes/tsunami
Continental Drift
#
Alfred Wegener had made idea of the continental drift
continents fit like puzzle pieces
Fossils match on different continents
Ancient climate was different
Geologic units match
seafloor is spreading
middle of Atlantic ocean is young rock and the edges are old
middle is thin outside is thick
seafloor has a mirror image of magnetic reversal types
How?
plate tectonics move
gravity
convection current
slab pull/ ridge push
3 different boundaries
#
divergent
convergent
transform
