Abyssal
plain
Thin platform
sedements
Continental
rift
Foreland
basin
Continental shelf
with thick
accumulation
of sedements
in rifted margin
Major tectonic elements of the earth's crust
Oceanic crust         continental crust
Mid ocianic ridge formed over
oceanic rift
Magmatic
arc with
volcanoes
Active orogenetic belt
composed of arc and
basin sediments
Older inactive
orogenetic belt
 
Oceanic crust
about 6 km
thick (varies)
   
trench  
 
    Moho  
Magma sourced
from hot
asthenosphere
Ascending
granitic diapirs
Continental crust about 35 km (thickness varies)
  Benioff earthquake zone indicative of subduction Stable cratonwith
greenstone belts (mobile belts)
 
The upper mantle, consisting of the
lithosphere and the underlying asthenosphere
(where flow occurs allowing plate tectonic movement)
Moho - discontinuity
at the base of the crust
 
       Many hundreds of kilometers