Benthonic foraminiferal paleoecology of the Brasso Formation (Globorotalia fohsi lobata and Globorotalia fohsi robusta [N11–N12] Zones), Trinidad, West Indies: A transect through an oxygen minimum zone

Wilson, Brent

doi:10.1016/j.jsames.2006.09.016

Cited by 10 publications

(5 citation statements)

References 27 publications

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“…Gooday et al (2000) found it to be abundant in well-oxygenated, abyssal water below the oxygen minimum zone (OMZ) of the Arabian Sea. Wilson (2004Wilson ( , 2007Wilson ( , 2008a reported the existence of an OMZ throughout much of the Brasso Formation (C. dissimilis-G. fohsi robusta Zones, N5-N12) of central Trinidad, which is coeval with part of the Cipero Formation. Nitrate levels are higher in OMZs relative to the water above and below (Lam et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

“…Stainforth (1948) ascribed the radiolarite development to an infrequent flux of volcanic ash, presumably from the nearby Lesser Antillean island arc. However, it has been suggested that localised radiolarites are associated with upwelling of nutrient-rich water (De Wever and Baudin, 1996), and there is evidence of upwelling in the partly coeval Brasso Formation (Catapsydrax dissimilis-G. fohsi robusta Zones, N5-N12) of central Trinidad (Wilson, 2004(Wilson, , 2007(Wilson, , 2008a. Stainforth (1948) and Bolli (1957) provided maps of the type section along the coastline south of San Fernando, but Carter (1966) found that it had been subject to considerable weathering and erosion even in the few years following Stainforth and Bolli's samplings and studies.…”

Section: The Cipero Formationmentioning

confidence: 99%

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Distinguishing relative specialist and generalist species in the fossil record

Wilson

Hayek

2015

Marine Micropaleontology

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Section: Discussionmentioning

confidence: 99%

Section: The Cipero Formationmentioning

confidence: 99%

Distinguishing relative specialist and generalist species in the fossil record

Wilson

Hayek

2015

Marine Micropaleontology

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“…Upper Jurassic-lower Valanginian carbonate rocks are locally exposed in San Fernando (site Fernando in Figure 2), but most of the sedimentary rocks exposed in Trinidad are siliciclastic rocks of Cenozoic age. In the Northern Basin and Central Range of Trinidad, the Brasso Formation consists of mud, shale, and silt of early to middle Miocene age (Wilson, 2007; Figure 3). The Brasso Formation is correlative with the upper part of the Cipero Formation of southern Trinidad (Bolli et al, 1995; Figure 3).…”

Section: Ii-2-stratigraphymentioning

confidence: 99%

“…According to Wilson (2007) and Wilson et al (2017), the Brasso Formation has been deposited during two tectonically induced Miocene transgressive regressive cycles. These could be related to the eastward advancement of the front of the Caribbean plate (Christenson et al, 2008;Garciacaro et al, 2011).…”

Section: Ii-2-stratigraphymentioning

confidence: 99%

Neogene Paleostress and Structural Evolution of Trinidad: Rotation, Strain Partitioning, and Strike-slip Reactivation of an Obliquely Colliding Thrust Belt

Hippolyte¹,

Mann²

2021

Memoir 123: South America—Caribbean—Central Atlantic Plate Boundary: Tectonic Evolution, Basin Architecture, and Petroleum Syst

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Kinematic analysis of faults in Trinidad reveal three main stages of the tectonic evolution of the southeastern Caribbean-South American plate boundary. During Stage 1, folds and thrusts identified on seismic lines and capped by a middle Miocene angular unconformity formed. They have been related by previous workers to the initial, oblique collision of the Great Arc of the Caribbean with the passive margin of South America. We propose that middle Miocene east-northeast-trending compression identified in this study initially had a more northwest-southeast direction and has been rotated in a clockwise direction during this collision. This tectonic stage may have resulted in clockwise rotation of structures along the southeastern Caribbean plate margin within a broad, right-lateral, strike-slip zone. During Stage 2 in the late Miocene and middle Pliocene, south-southeasttrending contraction uplifted the Central Range, formed the prominent south-vergent thrusts, bounded by oblique ramps such as the Los Bajos right-lateral strike-slip fault and formed piggy-back basins. This north-northwest-south-southeast trend of compression is compatible with coeval right-lateral shear on the El Pilar fault zone in Trinidad. We interpret this pattern of thrusts and strike-slip faults as the result of strain partitioning. In Stage 3 during the late Pliocene-Quaternary, east-southeast-trending compression reactivated previous thrusts with strike-slip motion, such as the Central Range fault. It deactivated previous, east-west-trending, strike-slip faults such as the El Pilar extension into Trinidad. The polyphase evolution of Trinidad results from the eastward motion of the Caribbean arc and the propagation of the southern Subduction-Transform Edge Propagator (STEP) fault of the Caribbean subduction. I-INTRODUCTION AND OBJECTIVESThe evolution of arcuate subduction zones is of major interest in geology. The island of Trinidad is located at the southeastern edge of the Caribbean arc. It is located in a key geodynamic position at the transition from oceanic subduction near Barbados to the strike-slip southern margin of the Caribbean plate. The eastward motion of the Caribbean plate has been constrained by its position between two major continental plates, the North and South American plates. Furthermore, the Caribbean plate is bounded by two active subduction zones, in the Lesser Antilles (to the east) and in Central America (to the west).The US Navy geodetic satellite (GEOSAT) marine gravity data compiled by Sandwell and Smith (2009) show elongate submarine and subaerial belts that can be traced as continuous features from the front of the north-south-trending Lesser Antilles subduction zone and Barbados accretionary prism to the east-west-trending southern edge of the plate in northern South America (Figure 1). Within the north-south-trending Lesser Antilles subduction complex, prominent elongate belts shown on the gravity map in Figure 1 include (1) the Aves ridge, the oldest part of the Cretaceous Great Arc of the Caribbean; (2) the ...

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“…Rather than comprising throughout the uniform, inky-blue clay typical of the Brasso Formation's type section in the Upper Caparo River (Renz, 1942;Wilson, 2007), the upper $50 m of Guaico-Tamana Road section incorporated ''a series of shallow, sand-filled channels" (Wilson, 2003) in a section having an overall strike and dip of 065°/40°NW. 2.…”

Section: Geological Backgroundmentioning

confidence: 99%

Benthonic foraminiferal paleoecology of the Brasso Formation (Globorotalia fohsi lobata and Globorotalia fohsi robusta [N11–N12] Zones), Trinidad, West Indies: A transect through an oxygen minimum zone

Cited by 10 publications

References 27 publications

Distinguishing relative specialist and generalist species in the fossil record

Distinguishing relative specialist and generalist species in the fossil record

Neogene Paleostress and Structural Evolution of Trinidad: Rotation, Strain Partitioning, and Strike-slip Reactivation of an Obliquely Colliding Thrust Belt

A lagoonal interlude with occasional hypersalinity in the deposition of the Early–Middle Miocene Brasso Formation of Trinidad

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