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The geologic history of the Caribbean-Cocos Plate Boundary with special reference to the Nicoya Ophiolite Complex (Costa Rica) and D.S.D.P. results (Legs 67 and 84 off Guatemala): A synthesis
Bourgois, J.; Azema, J.; Baumgartner, P.O.; Tournon, J.; Desmet, A.; Aubouin, J. (1984). The geologic history of the Caribbean-Cocos Plate Boundary with special reference to the Nicoya Ophiolite Complex (Costa Rica) and D.S.D.P. results (Legs 67 and 84 off Guatemala): A synthesis. Tectonophysics 108(1-2): 1-32
In: Tectonophysics. ELSEVIER SCIENCE BV: New York; London; Amsterdam. ISSN 0040-1951, more
Peer reviewed article  

Available in Authors 

Keywords
    Geological history; Geology; Ophiolites; Plate boundaries; Tectonophysics; Caribbean Plate; Cocos Plate; Marine

Authors  Top 
  • Bourgois, J.
  • Azema, J.
  • Baumgartner, P.O.
  • Tournon, J.
  • Desmet, A.
  • Aubouin, J.

Abstract
    The pre-upper Senoniah basement of Costa Rica crops out in the Santa Elena and Nicoya Peninsulas. From south to north and from base to top the basement includes: the Esperanza, Matapalo and Santa Elena units. The Esperanza unit is Albian-Santonian in age and consists mainly of pillow basalt and massive basal flows. The Matapalo unit includes Callovian to Cenomanian radiolarite and includes massive basalt flows, basalt, and dolerite basement. The Santa Elena unit contains ultramafic and mafic rocks in which harzburgite is the major component. The most important tectonic features of the Nicoya Complex are the large Santa Elena and Matapalo nappes. Nappe emplacement was from north to south during upper Santonian time.

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