Bourgois, Jacques et al. (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
Leg/Site/Hole:
Related Expeditions:
DSDP 67
Identifier:
ID:
1984-057412
Type:
georefid
Creator:
Name:
Bourgois, Jacques
Affiliation:
Univ. Pierre et Marie Curie, Dep. Geotect., Paris, France
Role:
author
Name:
Azema, Jacques
Affiliation:
Univ. Costa Rica, France
Role:
author
Name:
Baumgartner, Peter O.
Affiliation:
Univ. Nancy, France
Role:
author
Name:
Tournon, Jean
Affiliation:
Role:
author
Name:
Desmet, Alain
Affiliation:
Role:
author
Name:
Aubouin, Jean
Affiliation:
Role:
author
Identification:
Title:
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
Year:
1984
Source:
Tectonophysics
Publisher:
Elsevier, Amsterdam, Netherlands
Volume:
108
Issue:
1-2
Pages:
1-32
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.
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:23.0000 West:-92.1500 East:
-58.0000 South:7.0000
Keywords: Solid-earth geophysics; Caribbean Plate; Caribbean region; Cenozoic; Central America; Cocos Plate; continental margin; controls; Costa Rica; Cretaceous; Deep Sea Drilling Project; East Pacific; extension tectonics; geochemistry; geophysical surveys; Guatemala; igneous rocks; IPOD; Leg 67; Leg 84; Mesozoic; Middle America Trench; nappes; Nicoya Complex; North American Pacific; North Pacific; Northeast Pacific; ophiolite; Pacific Ocean; plate boundaries; plate convergence; plate tectonics; plutonic rocks; sedimentation; Senonian; stratigraphy; structural controls; surveys; tectonics; tectonophysics; Tertiary; ultramafics; unconformities; Upper Cretaceous;
.