what happened to wegener before his hypothesis was accepted
no one believed him because he couldn’t prove continental drift
what climate evidence did wegener use to support continental drift
he found that glaciers once existed in areas that are very warm, like south africa
what geologic evidence did wegener find about continents that are now separated by oceans
they looked like puzzle pieces and he found specific rock types in different continents
what is a divergent boundary
boundaries that move away from each other
what landform forms at an oceanic-oceanic divergent boundary
a mid-ocean ridge
what are two examples of mid-ocean ridges
mid-atlantic ridge and mid-indian ridge
what is the main example of a continental rift
east African rift
what landform forms at a continental-continental divergent boundary
a rift valley
what happens at a convergent boundary
the boundaries move towards each other
what is subduction
when one plate slides below the other (oceanic slides under continental)
which type of plate always gets subducted
oceanic since it is more dense
what is an example of an oceanic-oceanic convergent boundary
aleutian isalnds
what landform forms at a continental-continental convergent boundary
non-volcanic mountain ranges
what is an example of a continental continental convergent boundary
Himalayan mountains
how/where does a continental drift occur
oceanic oceanic divergent boundaries, it created new crust and pushes the continents
what is decompression melting
rock melts and rises to lower pressure zones, thinning crust and as this happens the mass on top goes down, less pressure at the opening of underwater volcanoes
where does decompression melting occur
divergent boundaries
what is flux melting
when a volatile get added lower the melting point, causing it to melt at a lower temperature than it would
where does flux melting occur
convergent boundaries
what is a transform boundary
the line where plates slide past each other
where is an example of a transform boundary
San andreas fault
what occurs at a transform boundary
earthquakes
what are the lowest spots in the ocean found at some convergent boundaries
trenches
what geological evidence did wegener use for pangea (crossword)
mountains
