Bourgois, Jacques; Azema, Jacques; Baumgartner, Peter O.; Tournon, Jean; Desmet, Alain; Aubouin, Jean (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. Elsevier, Amsterdam, Netherlands, Tectonophysics, 108 (1-2), 1-32, georefid:1984-057412
Abstract:
The pre-upper Senonian basement of Costa Rica crops out in the Santa Elena and Nicoya peninsulas. 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. The sedimentary cover of the Nicoya Complex comprises: (1) the Campanian El Viejo Formation, and Campanian-Maestrichtian Sabana Grande Formation; (2) Paleocene Las Palmas and Samara formations; (3) a post-upper Eocene (?) Barra Honda and Montezuma formations. Two unconformities are significant geological features of the upper-Senonian to Tertiary history of Costa Rica. Post-Campanian normal faulting. Multifold seismic reflection records off the west coast of Costa Rica and the DSDP Legs 67 and 84 transects off Guatemala. The western Caribbean Plate boundary may have been under extensional stress for the last 75 m.y. Available data are consistent with the convergent extensional margin concept.--Modified journal abstract.
Coverage:
West: -92.1500 East: -58.0000 North: 23.0000 South: 7.0000
West: NaN East: NaN North: NaN South: NaN
West: NaN East: NaN North: NaN South: NaN
West: NaN East: NaN North: NaN South: NaN
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