Rudist bivalve assemblages from the Back Rio Grande Formation (Cretaceous: Campanian) of Jamaica and their stratigraphic significance

Mıtchell, Sımon F.; Ramsook, Ryan

doi:10.1016/j.cretres.2008.07.009

Cited by 20 publications

(13 citation statements)

References 11 publications

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“…After tilting, the Washikemba Formation was unconformably overlain by the Rincon Formation [ Beets et al , 1977] (Figure 5), which contains granodioritic clasts that resemble the plutonic rocks on Aruba [ Pijpers , 1933]. The Rincon Formation was previously determined to be Maastrichtian [ Beets et al , 1977], but if the identification of the fossils in this sedimentary unit, including pseudorbitoides, is correct [ Beets et al , 1977], then the Rincon Formation may be Middle to Late Campanian [ Mitchell and Ramsook , 2009]. The Southern Complex is unconformably overlain by the Soebi Blanco fluvial conglomerate, which contains numerous continental‐derived gneissic and granitic clasts.…”

Section: Geological Framework and Previous Workmentioning

confidence: 99%

Thermochronology and tectonics of the Leeward Antilles: Evolution of the southern Caribbean Plate boundary zone

et al. 2010

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[1] Tectonic reconstructions of the Caribbean Plate are severely hampered by a paucity of geochronologic and exhumation constraints from anastomosed basement blocks along its southern margin. New U/Pb, 40 Ar/ 39 Ar, apatite fission track, and apatite (U-Th)/He data constrain quantitative thermal and exhumation histories, which have been used to propose a model for the tectonic evolution of the emergent parts of the Bonaire Block and the southern Caribbean Plate boundary zone. An east facing arc system intruded through an oceanic plateau during ∼90 to ∼87 Ma and crops out on Aruba. Subsequent structural displacements resulted in >80°C of cooling on Aruba during 70-60 Ma. In contrast, exhumation of the island arc sequence exposed on Bonaire occurred at 85-80 Ma and 55-45 Ma. Santonian exhumation on Bonaire occurred immediately subsequent to burial metamorphism and may have been driven by the collision of a west facing island arc with the Caribbean Plate. Island arc rocks intruded oceanic plateau rocks on Gran Roque at ∼65 Ma and exhumed rapidly at 55-45 Ma. We attribute Maastrichtian-Danian exhumation on Aruba and early Eocene exhumation on Bonaire and Gran Roque to sequential diachronous accretion of their basement units to the South American Plate. Widespread unconformities indicate late Eocene subaerial exposure. Late Oligocene-early Miocene dextral transtension within the Bonaire Block drove subsidence and burial of crystalline basement rocks of the Leeward Antilles to ≤1 km. Late Miocene-recent transpression caused inversion and ≤1 km of exhumation, possibly as a result of the northward escape of the Maracaibo Block. Citation: van der Lelij, R

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Section: Geological Framework and Previous Workmentioning

confidence: 99%

Thermochronology and tectonics of the Leeward Antilles: Evolution of the southern Caribbean Plate boundary zone

et al. 2010

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“…3a) represents the largest area of Cretaceous rocks in Jamaica (Krijnen and Lee Chin 1978). Its rugged topography, however, makes geological investigations difficult, and despite various studies (Krijnen and Lee Chin 1978;Draper 1986;Krijnen et al 1993;Montgomery and Pessagno 1999; Ramsook 2008;Mitchell and Ramsook 2009), the inlier is still poorly understood. The inlier contains three suites of contrasting rocks that Figure 2.…”

Section: Jamaican Geology: the Blue Mountain Inliermentioning

confidence: 99%

“…The geology of the northeastern part of the Blue Mountains is presented by Mitchell and Ramsook (2009;fig. 3b).…”

Section: Jamaican Geology: the Blue Mountain Inliermentioning

confidence: 99%

“…The oldest exposed rocks are lavas and brecciated lavas, which McFarlane (1977) termed the Durham Formation. These are succeeded by the Back Rio Grande Formation, a unit of thin limestones interbedded with volcaniclastic deposits (sandstones and conglomerates; Mitchell and Ramsook 2009). These limestones contain a diverse assemblage of rudist bivalves, including Barrettia monilifera Woodward and the larger foraminifer Pseudorbitoides trechmanni Douvillé (Krijnen et al 1993;Mitchell and Ramsook 2009), which indicate a Mid-Campanian age ( fig.…”

Section: Jamaican Geology: the Blue Mountain Inliermentioning

confidence: 99%

“…The overlying ∼600-1500-m-thick Bellevue Formation consists of a series of lava flows interbedded with minor volcaniclastic sediments and is succeeded by a rudist-bearing limestone unit, the Rio Grande Formation (e.g., Krijnen and Lee Chin 1978). The Rio Grande Formation contains a suite of rudists and larger foraminifers of Late Campanian age (Mitchell and Ramsook 2009;fig. 3b).…”

Section: Jamaican Geology: the Blue Mountain Inliermentioning

confidence: 99%

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