Introduction
Evidence of Continental Drift
Ocean Floor Features
Seafloor Spreading Theory
Miscellaneous
100
What is earth's outer surface comprised of?
Rigid mobile plates
100
The fit of what is evidence?
Continents
100
What is the underwater moutain chain in each ocean?
Ridges
100
Who developed this theory?
Harry Hess
100
What is the plate tectonic theory a combination of?
Continental drift and seafloor spreading
200
This explains the locations of (list 3)
volcanoes, earthquakes, ocean trenches, mountains, mid ocean ridge system
200
What kind of sediment types were evidence?
Rock types
200
What is deepest part of the ocean near island arcs?
Trenches
200
What causes spreading?
Convection in the asthenosphere
200
What is one characteristic of plates?
rigid, mobile, made of lithosphere
300
What is evolution of plate tectonics developed from?
Continental drift theory
300
What kind of belts were present for evidence?
Mountain Belts
300
What are the long fractures in ocean bottoms?
Fracture zones
300
What is the heated material rises below ridges?
Spreading centers
300
What do iron bearing minerals in rock record?
normal and reversed polarity
400
Who is the evolution of plate tectonics proposed by?
Alfred Wegener
400
What type of evidence is glacial striations from sea to land?
Paleoclimatic
400
What are oriented perpendicular to the ridges?
Transform faults
400
Where is the lithosphere that descends into trenches destoryed at?
Subduction zones
400
In ocean drilling what does the sediment thickness do?
Increases away from oceanic ridges
500
What is supercontinent called?
Pangaea
500
What is remains of animals and plants that was used for evidence?
Fossil
500
Where do most trenches occur?
Pacific ocean
500
What is the new oceanic crust continually doing?
Created at ridges and destroyed at trenches
500
What are chains of islands that form over a stationary magma source?
hot spots
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