plate tectonics 2 Flashcards
continents (orgigins, rifiting, margins, collisions), hotspots, the rock cycle
what is ablsolute plate velocity?
the rate of motion of a lithospheric plate with respect to a stationary location inside the earth
what is relative plate velocity?
the motion of a plate with respect to another plate
where are broad, sediment- covered continental shelves found?
passive margins
what type of plate boundary is the San Andreas fault?
transform
how deep is the wadati-benioff zone?
660km
what are hotspots caused by?
hot plumes of mantle material that rise up through cooler, denser surrounding rock
what is an example of continental rift?
the Basin and Range Province
mid ocean ridges are segmented and contain which 2 types of basic plate boundaries linked together?
divergent and transform
a great boost in seafloor exploration and a greater understanding of seafloor bathymetry was a result of …?
military needs in WW2
what do marine magnetic anomaly belts run parallel to?
mid ocean ridges
all basalts younger than 700,000 years old …?
have normal polarity
