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The idea proposed by Alfred Wegener to explain the continental shapes and positions is known
as - Answers Continental Drift
Which two are the best best examples of the "puzzle-piece" argument? - Answers South
America & Africa
What evidence, left by glaciers that supports the existence of Pangea - Answers glacial striations
(movement of glaciers)
drifted and in different places
Permian till
-found in 4 continents
Australia
India
Africa
South America
- the tills in Africa and India are now near the equator (NO ICE AGE hypothesis)
List all of the early evidence of continental drift? - Answers -Continental "Fit"
(Pangea)
- Location of glacial
(the till that was found in four diff continents)
- fossil organisms
(identical fossils found were widely separated, could not have crossed an ocean)
, - rock type & structure similarities
(rock assemblage are now on opposite sides)
-Paleoclimatic preserved in rocks
(rocks went through the same climate)
What was the name of the floral fossils Wegener used to support his idea of continental drift? -
Answers Glossopteris
plant could not across oceans
woody - seed bearing shrub or tree
found in southern continents
In the figure below, what is the approximate age of the sea floor off the north coast of Spain? -
Answers 83.0 - 141.9 million years
(Mid-Atlantic Ridge)
Which type of plate boundary results from two or more plates coming together? - Answers
Convergent boundary --><--
Different types of convergent boundaries - Answers 3 types:
similarity: o-c, o-o,
cause earthquakes and volcanoes
ocean -> <- ocean
ocean -> <- continental
continental -> <- continental
ocean -> <- ocean - Answers ocean -> <- ocean
The older plate will subduct because of its higher density (weight). The subducting plate is
heated as it is forced deeper into the mantle, begins to melt.