Page 182 - Whole Earth Geophysics An Introductory Textbook For Geologists And Geophysicists
P. 182

165
      Settings
      of  Tectonic
      Expression
      Seismic
              East  Margin  Continental  Passive   Section   Cross  Lithosphere   a)   >  ——   km   800   -   §0   «  =~   Rise   g   Shelf   Plain  Coastal   ioe ity  _Postrift Segiments  Synrift Sediments   D   ate              layer.   water  Transparent   1.   sediments.   postrift   from  Reflections   2.   crust.  continental  extended  defining  wedges  graben   Rift   3.   boundary.  continent/ocean   at  wedges  Seaward-dipping   4.   crust.  of oceanic   top  defining  (unm
       Profiles                                                                             R.  Chase,  E.  Davis,   AGU  Union,  Washington,  D.C.   by  layer  2)  is  cut  the  north  Atlantic  Ocean.  The   across  recorded  Detrick,  and T.  Brocher,  Journal   Union,  Geophysical
       Reflection                                                                           Beck,  Caribbean  and  Scotia  Arcs,   ic   Hyperbolic  (“bow  tie   section

       Seismic                                                                              Riddihough,  M.   Geophysical   (c   t   from   time   R.  Kappus,   of  the  American

       Of                                                                                   R.   Region,   b   The  Unmigrated  depth  section  of  flat-lying  sediments.   Migrated   permission
       interpretation   10km                    |                                           FIGURE      Ridge.  From   Pacific  Eastern  permission  of  the  American      km   1.5  top  of  oceanic  basement.  c)   A. Harding,  M.   Moho  reflections.   =




       Tectonic                                                                             Fuca  Juan  de   with   and b   sedi   sediments.  b)   Buhl,  J.  Orcutt,  ©  1991.  Redrawn  with   reflection;  M


       And                                     4   ‘fi   3                           RS       Rogers,  Geodynamics  of the   Redrawn   layered   deep,  covered  by  about   hummocky   P.  J. Mutter,
       Structural                                4                                   cae   a ot   profile  of  the   1983.   ©   above   deep-marine   km   the   E.  Vera,   15529-15556,   magma  chamber



                                                                                     ft     reflection   G.   with  blocks  fill   is  about  5.3   7  km  deep,  reveal   vol.  95,  pp.   axial   =
       Chapter 6   West                                                                     a)  Seismic  Hyndman,  S.  Johnson,  and  Geodynamics  Series,  no.  9,  pp.  5-21,   reflection-free  zone   water  layer   Rise.  From   Pacific   AMC   D.C.




       164      AS]     wt          +    ©     ~@                                           6.28   is  a  water  faults;  downdropped   reflections,  about   East  Geophysical  Research,
               (S)  OWL,  JOAPIL                                 (s)  eu,  Jenes,  AB/AA-OML        transparent   Washington,
          &      AB/-OML         Q       (unpyideq         O                                  R.   ‘The   of  the
   177   178   179   180   181   182   183   184   185   186   187