Ch 2 Flashcards
1
Q
Paleomagnetism
A
the record of ancient magnetism preserved in rock
proved that continents moved
shows where continent (rock) was relative to earth’s pole
furthers Wegener’s thesis
2
Q
Evidence of Wegener’s Theory
A
Fit of Continents/Matching Geologic Units
Location of past glaciations (where same sediments are)
Distribution of climatic belts (distribution of swamps etc)
Distribution of Fossils
3
Q
Volcanic Island Arcs
A
produced by subduction
alaskan aleutian islands
japan
4
Q
what happens to subduction plates when continent collides?
A
end of subduction zone/convergent boundary
crust is too buoyant to submerge
fuse into one continent
