Plate Tectonics Flashcards
(27 cards)
What was the name of the super continent
Pangea
Name of the person who had theory of continental drift
Wilfred Wagner
When did Pangea exist
250 million years ago
Earliest piece of evidence for continental drift
Fit Africa and South America
What was the better fit
Continental shelf
Some factors that can change the location of the crust
Erosion deposition
Where would u think continental crust ends
Further out into the ocean
Wagoners strongest evidence
Identical fossils on widely spread continents
2 locations where animals may have moved Friday krone continent to another
Russia / n. America
Is it true that Mesosaurus, lystrosarus, cynognathus evolved due to similar conditions
No, randomness would not allow this.
Poorly sorted, sub angular to sub rounded deposit of clay, silt, sand, gravel and boulders, the boulders have obvious striations
Glacial
A sandstone which is very well sorted
Desert
The shake contains fossil amphibian bones mud cracks and rain prints
Tropical
Limestone layers containing fossil corals and fossil shallow water shelfish
Tropical
Why are climates different from present day
Moved
What was the main objection to wagoners theory
Could not prove how they were moving
Divergent boundary
Pulling apart
How did we map the marianas trench
Challenger mapped by ropes it being 5 miles long then later sonar mapped it to b a linear line
Sonar
Radio freq to mapping fishing military
Where are deepest and shallow waters
Deep close to land - shallow at mid ocean ridges
Name of ship
Triest
What did mapping of earthquakes overlap
Ridges and trenches
What showed symmetry across ridge
Magnetic reversal
Magnetic reversl
Indicates motion and allows for time and Kate calculations
