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Geotektonik – Global Tectonics
CHAPTER 2
Plate motion and plate
boundaries
relative plate motion
V1/2
v
V1/2
relative plate motion
V1/2
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V1/2 ??
V1/2
relative plate motion
V1/2
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V1/2
V1/2 ??
Seafloor spreading is approximately symmetric in
many cases, but lithospheric growth along divergent
plate boundaries can be slightly asymmetric
„absolute“ plate motion
u
„absolute“ plate motion
u
Presumption is a global „hot spot reference
frame“ – but this concept is obsolete. Hot spots
move relative to each other…. (not unexpected)
two approaches to relative plate motion
(1) age distribution of oceanic lithosphere
(2) high resolution geodetic methods
global tectonics 2016-17 chapter 2(1).pdf (PDF, 23.58 MB)
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