Geologic Time
Landform that is still forming today
Western Cordillera
type of rock that contains fossils
sedimentary
Pangaea existed this long ago
300 million years
layer that contains the convection currents
mantle
physical process that breaks down rock
weathering
% of Earth's history that the Mesozoic takes up
4%
how metamorphic rocks form
heat and pressure
Wegener's first piece of proof he noticed
jig saw
layer that contains solid metal
inner core
the Himalayas are formed from this process
folding
Earliest era
Precambrian
The rock type that contains metallic mineral ores that we mine today
metamorphic
oceanic and continental
when two plates pull apart in the ocean it creates this feature
Subduction creates these 2 features on land
mountains and volcanoes
Dinosaurs went extinct at the end of this era
Mesozoic
rock type that forms from the cooling of magma
igneous
allowed scientists to "see" trenches and ridges in the ocean
underwater sonar
another name for the crust layer
lithosphere
this physical process added the finishing touches to Canada's land in the Cenozoic era
glaciation
landform region formed during Pangaea
Appalachians
sedimentary
Year that the theory of Continental Drift was proposed
1915
layer that generates the Earth's magnetic field
outer core
fastest land building process
volcanoes