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Plate Techtonics (Continental Drift (Sediment thickness (Seafloor is…
Plate Techtonics
Continental Drift
Fossil match
Quaitative
Ancient Climates
Qualitative
Used to to be tropical
Fits like a puzzle
Qualitative
Look like they all fit together
Geological units match
Qualitative
Age
Seafloor is spreading
Quantitative
Atlantic Ocean
Sediment thickness
Seafloor is spreading
Quantitative
Paleomagnetism
Atlantic Ocean
Magnetic reversal
Seafloor is spreading
Quantitative
Atlantic Ocean
Alfred Wegener
#
Theory of Continental Drift
Pangea
All continents were together
#
Everyone thought he was wrong
How does it work?
Ridge, Slab, Push, Pull
Transform boundary
Convergent boundary
Divergent boundary
Convection Currents
Mid-Ocean ridge
Gravity
Pulls more dense magma towards the core
Forces less dense magma up
Core is hot!
Radio Active decay
Radiation
Density changes
Magma around core heats up
Becomes less dense
Hot Spots
Core
Eartquake
Tsunami
Volcanoes
#
Cinder
Volcano
Chain of islands
Made up of liquid magma
Boundaries
#
Divergent
Move away from eachother
Divide
Only place where new crust forms
Also known as:
Extension boundary
Constructive boundary
Convergent
Move towards eachother
2 types of crust
Continental
Made of silica
Oceanic
Made of metals
3 types of boundaries
Oceanic-Continental
Makes volcanoes
Oceanic-Oceanic
Makes islands
Continental-Continental
Mountain maker
Transform
Moves passed eachother
Many found on sea floor
San Andreas fault is one
Earthquakes
Tsunami
