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global tectonics 2016 17 chapter 4 .pdf

Original filename: global tectonics 2016-17 chapter 4.pdf
Title: global tectonics 2016-17 chapter 4
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Geotektonik – Global Tectonics


Mid ocean ridges (MOR)
structure of normal oceanic crust

we have discussed submarine ridge
topography on various length scales….


Topography of slowly spreading MOR
Example: Sounth-Indian Ridge
View towards the W at 116°E, ca. 80 km
from B. Haxby (1998) Geoph. Monogr. 106

Topography of fast spreading MOR
Example: East-Pacific rise (EPR) at 7°S
View towards South over ca. 160 km
from B. Haxby (1998) Geoph. Monogr. 106


What a geologist can do

All other information comes from geophysics
(topography, seismology, magnetics …..)

(images AGU)

DSV Alvin (Woods Hole; USA)
Deep Submergence Research Vehicle

maximum depth 4500 m
after reconstruction 6000 m
(expected for 2015)
(images AGU)


Remotely Operated Underwater Vehicle
ROV Hercules (NOAA)

(images AGU)

National Oceanic and Atmospheric Administration (USA)


Joides Resolution

(images AGU)


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