The role of oceanographic conditions on Cenozoic carbonate platform drowning: Insights from Alpine and Apennine foreland basins

Terra Nova ◽  
2019 ◽  
Vol 31 (2) ◽  
pp. 102-110 ◽  
Author(s):  
Marco Brandano
Keyword(s):  
Carbonate Platform ◽  
Foreland Basins ◽  
Platform Drowning ◽  
Oceanographic Conditions

scholarly journals The biostratigraphic record of Cretaceous to Paleogene tectono-eustatic relative sea-level change in Jamaica

2018 ◽  
Author(s):  
David Patrick Gold ◽  
James P. G. Fenton ◽  
Manuel Casas-Gallego ◽  
Vibor Novak ◽  
Irene Pérez-Rodríguez ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Carbonate Platform ◽  
Caribbean Region ◽  
Level Curve ◽  
Relative Sea Level ◽  
Carbonate Production ◽  
Platform Drowning ◽  
Relative Sea Level Rise ◽  
Strong Control

The island of Jamaica forms the northern extent of the Nicaraguan Rise, an elongate linear tectonic feature stretching as far as Honduras and Nicaragua to the south. Uplift and subaerial exposure of Jamaica during the Neogene has made the island rare within the Caribbean region, as it is the only area where rocks of the Nicaraguan Rise are exposed on land. Biostratigraphic dating and palaeoenvironmental interpretations using larger benthic foraminifera, supplemented by planktonic foraminifera, nannopalaeontology and palynology of outcrop, well and corehole samples has enabled the creation of a regional relative sea-level curve through identification of several depositional sequences. This study recognises ten unconformity-bounded transgressive-regressive sequences which record a complete cycle of relative sea level rise and fall. Sequences are recognised in the Early to ‘Middle’ Cretaceous (EKTR1), Coniacian-Santonian (STR1), Campanian (CTR1), Maastrichtian (MTR1-2), Paleocene-Early Eocene (PETR1), Eocene (YTR1-3) and Late Eocene-Oligocene (WTR1). These transgressive-regressive cycles represent second to fourth order sequences, although most tie with globally recognised third order sequences. Comparisons of the Jamaican relative sea-level curve with other published global mean sea-level curves show that local tectonics exerts a strong control on the deposition of sedimentary sequences in Jamaica. Large unconformities (duration >1 Ma) are related to significant regional tectonic events, with minor overprint of a global eustatic signal, while smaller unconformities (duration <1 Ma) are produced by global eustatic trends. The relatively low rates of relative sea-level rise calculated from the regional relative sea-level curve indicate that carbonate production rates were able to keep pace with the rate of relative sea-level rise accounting for the thick successions of Maastrichtian carbonates and those of the Yellow and White Limestone Groups. Carbonate platform drowning within the White Limestone Group during the Oligocene to Miocene is attributed to environmental deterioration given the low rates of relative sea-level rise.

The significant role of sediment bio-retexturing within a contemporary carbonate platform system: Implications for carbonate microfacies development

2009 ◽  
Vol 219 (1-4) ◽  
pp. 169-179 ◽  
Author(s):  
Michael J. O'Leary ◽  
Christopher T. Perry ◽  
Simon J. Beavington-Penney ◽  
John R. Turner
Keyword(s):  
Significant Role ◽  
Carbonate Platform ◽  
Carbonate Microfacies ◽  
Platform System

scholarly journals Bridging the Faraoni and Selli oceanic anoxic events: short and repetitive dys- and anaerobic episodes during the late Hauterivian to early Aptian in the central Tethys

2011 ◽  
Vol 7 (3) ◽  
pp. 2021-2059 ◽  
Author(s):  
K. B. Föllmi ◽  
M. Bôle ◽  
N. Jammet ◽  
P. Froidevaux ◽  
A. Godet ◽  
...  
Keyword(s):  
Carbonate Platform ◽  
Central Italy ◽  
Second Phase ◽  
Anaerobic Conditions ◽  
Humid Climate ◽  
Carbonate Production ◽  
Climate Conditions ◽  
Platform Drowning ◽  
Anoxic Events ◽  
German Basin

Abstract. A detailed stratigraphical and geochemical analysis was performed on the upper part of the Maiolica Formation outcropping in the Breggia (southern Switzerland) and Capriolo sections (northern Italy). In these localities, the Maiolica Formation consists of well-bedded, partly siliceous, pelagic, micritic carbonate, which lodges numerous thin, dark and organic-rich layers. Stable-isotope, phosphorus, organic-carbon and a suite of redox-sensitive trace-metal contents (RSTE: Mo, U, Co, V and As) were measured. Higher densities of organic-rich layers were identified in the uppermost Hauterivian, lower Barremian and the Barremian-Aptian boundary intervals, whereas the upper Barremian interval and the interval immediately following the Barremian-Aptian boundary interval are characterized by lower densities of organic-rich layers. TOC contents, RSTE pattern and Corg:Ptot ratios indicate that most layers were deposited under dysaerobic rather than anaerobic conditions and that latter conditions were likely restricted to short intervals in the latest Hauterivian, the early Barremian and the pre-Selli early Aptian. Correlations are possible with organic-rich intervals in central Italy (the Gorgo a Cerbara section) and the Boreal northwest German Basin, and with the facies and drowning pattern in the evolution of the Helvetic segment of the northern Tethyan carbonate platform. Our data and correlations suggest that the latest Hauterivian witnessed the progressive installation of dysaerobic conditions in the Tethys, which went along with the onset in sediment condensation, phosphogenesis and platform drowning on the northern Tethyan margin, and which culminated in the Faraoni anoxic episode. This brief episode is followed by further episodes of dysaerobic conditions in the Tethys and the northwest German Basin, which became more frequent and progressively stronger in the late early Barremian. Platform drowning persisted and did not halt before the latest early Barremian. The late Barremian witnessed diminishing frequencies and intensities in dysaerobic conditions, which went along with the progressive installation of the Urgonian carbonate platform. Near the Barremian-Aptian boundary, the increasing density in dysaerobic episodes in the Tethyan and northwest German Basins is paralleled by a change towards heterozoan carbonate production on the northern Tethyan shelf. The following return to more oxygenated conditions is correlated with the second phase of Urgonian platform growth and the period immediately preceding and corresponding to the Selli anoxic episode is characterized by renewed platform drowning and the change to heterozoan carbonate production. Changes towards more humid climate conditions were likely the cause for the repetitive installation of dys- to anaerobic conditions in the Tethyan and Boreal basins and the accompanying changes in the evolution of the carbonate platform towards heterozoan carbonate-producing ecosystems and platform drowning.

The role of oceanographic conditions and plankton availability in larval fish assemblages off the Catalan coast (NW Mediterranean)

2010 ◽  
Vol 19 (3) ◽  
pp. 209-229 ◽  
Author(s):  
M. PILAR OLIVAR ◽  
MIKHAIL EMELIANOV ◽  
FERNANDO VILLATE ◽  
IBON URIARTE ◽  
FRANCESC MAYNOU ◽  
...  
Keyword(s):  
Fish Assemblages ◽  
Larval Fish ◽  
Catalan Coast ◽  
Nw Mediterranean ◽  
Oceanographic Conditions
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