Tectonic evolution of the Caribbean region; Alternative hypothesis

Morris, A. E. L.; Taner, Irfan; Meyerhoff, Howard A.; Meyerhoff, A. A.

doi:10.1130/dnag-gna-h.433

Cited by 10 publications

(14 citation statements)

References 128 publications

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“…Burke 1988; Pindell et al . 1988; Ross & Scotese 1988; Morris et al . 1990; Pindell 1993; Meschede & Frisch 1998; Giunta et al .…”

Section: The Tacagua Unitmentioning

confidence: 99%

“…In the geodynamic reconstructions proposed for the Caribbean area (e.g. Burke 1988; Pindell et al 1988;Ross & Scotese 1988;Morris et al 1990;Pindell 1993;Meschede & Frisch 1998;Giunta et al 2002), the high pressure-low temperature ophiolites from northern Venezuela are interpreted as a remnants of the Proto-Caribbean oceanic lithosphere involved in the subduction zone located at the northwestern corner of the South America Plate in the Early Cretaceous time. The main features of the subduction zone such as its dip, the dip direction, etc.…”

Section: Geodynamic Implicationsmentioning

confidence: 99%

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Tectono‐metamorphic history of the Tacagua ophiolitic unit (Cordillera de la Costa, northern Venezuela): Insights in the evolution of the southern margin of the Caribbean Plate

Ellero

Malasoma²,

Marroni

et al. 2007

Island Arc

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The southern margin of the Caribbean Plate is well exposed in the Cordillera de la Costa of northern Venezuela, where amalgamated terranes consisting of continental and oceanic units occur. In the Cordillera de la Costa, metamorphosed oceanic units crop out along the coast near Caracas. Among them, the Tacagua unit is characterized by metaserpentinites and metabasites showing mid-oceanic ridge basalt geochemical affinity. These lithologies, representative of a disrupted ophiolite sequence, are associated with metasediments consisting of calcschists alternating with pelitic and psammitic schists, whose protoliths were probably represented by deep-sea hemipelagic and turbiditic deposits. In the Tacagua unit, a polyphase deformation history has been reconstructed, consisting of four folding phases from D1 to D4. Geological setting suggests an involvement of the Tacagua unit in the processes connected with a subduction zone. The following deformations (from D2 to D4) observed in the field might be related to the exhumation history of the Tacagua unit. The late deformation history consists of an alternation of deformation phases characterized by displacement parallel (D2 and D4 phases) and normal (D3 phase) to plate boundary between the Caribbean and South America Plates. All lines of geological evidence suggest that the whole evolution of the Tacagua unit was acquired in a setting dominated by oblique convergence, in which alternation of strike-slip and pure compressional or pure extensional tectonics occurred through time.

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“…Burke 1988; Pindell et al . 1988; Ross & Scotese 1988; Morris et al . 1990; Pindell 1993; Meschede & Frisch 1998; Giunta et al .…”

Section: The Tacagua Unitmentioning

confidence: 99%

Section: Geodynamic Implicationsmentioning

confidence: 99%

Tectono‐metamorphic history of the Tacagua ophiolitic unit (Cordillera de la Costa, northern Venezuela): Insights in the evolution of the southern margin of the Caribbean Plate

Ellero

Malasoma²,

Marroni

et al. 2007

Island Arc

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“…Volcanic activity began in the Lesser Antilles approximately 40 million years ago (mya) in the Eocene (Morris et al 1990;Pindell and Barrett 1990). However, Dominica belongs to a younger, still volcanically active section where activity is widely considered to have begun in the late Miocene (Ӎ 15 mya), becoming widespread approximately 5 mya, in the Pliocene (Maury et al 1990).…”

mentioning

confidence: 99%

The Dynamics of Natural Selection and Vicariance in the Dominican Anole: Patterns of Within-Island Molecular and Morphological Divergence

Malhotra¹,

Thorpe

2000

Evolution

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Abstract. The larger islands of the Lesser Antilles are ecologically and geologically complex and are inhabited by single, but morphologically variable, Anolis species. Although earlier work has indicated that a large part of the morphological variation in Anolis oculatus from Dominica can be attributed to selection, a history of recurrent volcanic activity over the last few million years suggests that vicariance may have also played a significant role. We report a study of variation in the cytochrome b gene of mitochondrial DNA across the island to address this issue. We uncovered a very high degree of polymorphism, with an overall gene diversity of 0.97 and a nucleotide diversity of 0.04. Sequences, on average, differ by 3.82% and the maximum pairwise divergence (corrected for multiple hits) is 9.29%. Most haplotypes are restricted to single localities (a pattern not changed by increasing the sample size). Phylogenetic analysis revealed the presence of two distinct lineages on the island with strong phylogeographic structure. One of these is geographically restricted to a relatively small part of the central Caribbean coast. Sublineages were also discernible within the other more widely distributed lineage, but resolution within and support for these sublineages was poor. The phylogeographic pattern is not congruent with generalized body shape and scalation, but is significantly correlated with color pattern. Even when correcting for this lineage effect with partial Matrix correspondence tests, the relationship between color pattern and vegetation is reaffirmed, suggesting that although both vicariance and selection have played a role in the morphological differentiation of this species, selection for current environmental conditions has been more important. We discuss the causes of the phylogeographic structure in light of the volcanic history of the island and highlight the exceptional instance of congruence between all morphological character systems and lineage boundaries, which occurs at the transition between the northern and southern Caribbean ecotypes.

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“…Los modelos geotectónicos relacionados con la placa del Caribe (Anderson & Schmidt, 1983;Beck, 1986;Dengo, 1985;Morris et al, 1990;Pindell & Barret, 1990;Ross & Scotese, 1988;Stephan et al, 1990), están condicionados a las corrientes de pensamiento relacionadas al significado de la corteza caribeña de tipo oceánico:…”

Section: La Placa Del Caribe: Generalidadesunclassified

Geologia de las margenes de la placa del Caribe: generalidades en Guatemala, Costa Rica, la Española y resultados preliminares del analisis de una transversal en la cordillera de la costa de Venezuela

Giunta

Navarro

Beccaluva

et al. 2011

Rev. Geol. Amér. Central

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ABSTRACT:The Caribbean Plate margins are constituted by deformed belts built up since the Cretaceous in a compressional and strike-slip stress field, which allowed overthrusting of the Caribbean crust onto the Pacific, North and South American Plates. The Caribbean borders include Jurassic-Cretaceous ophiolitic units (Great Antilles, Venezuela, Costa Rica, Guatemala, etc.), composed by mantle peridotites, gabbros, volcanic and sedimentary covers, which have been deformed in at least two ductile penetrative phases and were often metamorphosed in the prehnite-pumpelleyite, green and blue schist, amphibolite, and in places eclogite facies. These units may present part of a subduction complex or are an accretionary prism. This paper deals with a regional geological survey (1989)(1990)(1991)(1992)(1993) conducted on the main periCaribbean ophiolitic units of Guatemala, Costa Rica, Hispanola, and Venezuela. The preliminary data, recently updated with new and detailed researches, allow to recognize the magmatic affinities (MORB and IAT) of the different reconstructed lithological sequences, which can be related with an hypothetical kinematic model of the development of the Caribbean Plate.RESUMEN: Los márgenes de la placa del Caribe están constituidos por cinturones deformados debido a una serie de fases compresivas ocurridas desde el Cretácico, con esfuerzos tensionales y/o fallas transcurrentes superpuestos. Estos cinturones deformados contienen porciones variables de corteza caribeña sobrecorrida a las placas adyacentes (Norte y Suramericana, Pacífica). En las Antillas Mayores, Venezuela, Costa Rica y Guatemala se conocen unidades ofiolíticas de edad Jurásica-Cretácica, constituidas por secuencias de manto, corteza y una cubierta sedimentaria más o menos espesa; las secuencias se encuentran generalmente serpentinizadas, deformadas en al menos dos fases dúctiles penetrativas y metamorfizadas en las facies prehnita-pumpellita, esquistos azules y esquistos verdes. Desde el punto de vista tectónico-cinemático es posible incluir estas unidades en porciones de complejos de subducción construidos por accreción o "underplating". En el presente estudio regional sobre las principales unidades ofiolíticas de los márgenes del Caribe, se evidencian diferentes secuencias litológicas pertenecientes a procesos evolutivos con diferentes tendencias, desde MORB a IAT. Los resultados preliminares de una transversal en la Cordillera de la Costa de Venezuela permiten interpretar algunas secuencias litológicas como provenientes de protolitos tipo MORB.

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Tectonic evolution of the Caribbean region; Alternative hypothesis

Cited by 10 publications

References 128 publications

Tectono‐metamorphic history of the Tacagua ophiolitic unit (Cordillera de la Costa, northern Venezuela): Insights in the evolution of the southern margin of the Caribbean Plate

Tectono‐metamorphic history of the Tacagua ophiolitic unit (Cordillera de la Costa, northern Venezuela): Insights in the evolution of the southern margin of the Caribbean Plate

The Dynamics of Natural Selection and Vicariance in the Dominican Anole: Patterns of Within-Island Molecular and Morphological Divergence

Geologia de las margenes de la placa del Caribe: generalidades en Guatemala, Costa Rica, la Española y resultados preliminares del analisis de una transversal en la cordillera de la costa de Venezuela

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