Distribution of sedimentary organic matter in Anisian carbonate series of S Poland: evidence of third-order sea-level fluctuations

2005 ◽  
Vol 94 (2) ◽  
pp. 267-274 ◽  
Author(s):  
Annette E. G�tz ◽  
Joachim Szulc ◽  
Susanne Feist-Burkhardt
Keyword(s):  
Organic Matter ◽  
Sea Level ◽  
Sedimentary Organic Matter ◽  
Third Order ◽  
Sea Level Fluctuations ◽  
S Poland

Subsurface geological imaging of northeastern Tunisia during the middle to the upper Eocene: Insights from integrated geophysical interpretation

2021 ◽  
pp. 1-64
Author(s):  
Oussama Abidi ◽  
Kawthar Sebei ◽  
Adnen Amiri ◽  
Haifa Boussiga ◽  
Imen Hamdi Nasr ◽  
...  
Keyword(s):  
Sea Level ◽  
Regional Scale ◽  
Upper Eocene ◽  
Sea Level Changes ◽  
Seismic Profiles ◽  
Borehole Data ◽  
Third Order ◽  
Good Correspondence ◽  
Basin Inversion ◽  
Sea Level Fluctuations

The Middle to Upper Eocene series are characterized by multiple hiatuses related to erosion, non-deposition or condensed series in the Cap Bon and Gulf of Hammamet provinces. We performed an integrated study taking advantage from surface and subsurface geology, faunal content, borehole logs, electrical well logs, vertical seismic profiles and surface seismic sections. Calibrated seismic profiles together with borehole data analysis reveal unconformities with deep erosion, pinchouts, normal faulting and basin inversion which are dated Campanian, intra-Lutetian and Priabonian compressive phases; these events were also described at the regional scale in Tunisia. Tectonics, sea level fluctuations and climate changes closely controlled the depositional process during the Middle to Upper Eocene time. The depositional environment ranges from internal to outer platform separated by an inherited paleo-high. We determine eight third order sequences characterizing the interaction between tectonic pulsations, sea level changes and the developed accommodation space within the Middle to Upper Eocene interval. We correlate the obtained results of the Cap Bon-Gulf of Hammamet provinces with the published global charts of sea-level changes and we find a good correspondence across third order cycles. Model-based 3D inversion proved to be a solution to model the lateral and vertical lithological distribution of the Middle to Upper Eocene series.

scholarly journals Facies patterns and depositional processes in two Frasnian mixed siliciclastic-carbonate systems in the Cantabrian Mountains, northwest Spain

Geologos ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 1-23
Author(s):  
Gerard B.S. van Loevezijn ◽  
J.G.M. Raven
Keyword(s):  
Sea Level ◽  
Cantabrian Mountains ◽  
Third Order ◽  
Relative Sea Level ◽  
Sea Level Fluctuations ◽  
Depositional Processes ◽  
Gravity Flows ◽  
Entry Points ◽  
Basin Geometry ◽  
Order Sequence

AbstractRelative sea level fluctuations during the Frasnian generated two shallow-marine, mixed siliciclastic-carbonate successions in the Devonian Asturo-Leonese Basin. Each system represents a third-order sequence-stratigraphical unit deposited in the same basin during comparable extreme greenhouse conditions without nearby fluvial entry points. Depositional control on the siliciclastic and carbonate distribution was driven by relative sea level fluctuations, basin geometry, availability of sand and the way sediment was distributed by shelf currents. Early Variscan flexural bending of the continental crust changed the basin shape from a shelf with a gradual profile and low dip (early Frasnian) towards a shelf with a steep depositional dip (late Frasnian). Shelf distribution changed from along-shelf transport (early Frasnian) towards offshore-directed gravity flows (late Frasnian). As a consequence, siliciclastic-carbonate distribution changed from a predominance of skeletal carbonate in the proximal shoreface – foreshore area and siliciclastic predominance distally (early Frasnian), to a distribution pattern with proximal shoreface skeletal carbonates, offshore muddy carbonates and a siliciclastic zone in between where gravity flows distributed the siliciclastic sediment down dip (late Frasnian).

scholarly journals The Impacts of the Middle Holocene High Sea-Level Stand and Climatic Changes on Mangroves of the Jucuruçu River, Southern Bahia – Northeastern Brazil

Radiocarbon ◽  
2017 ◽  
Vol 59 (1) ◽  
pp. 215-230 ◽  
Author(s):  
Neuza Araújo Fontes ◽  
Caio A. Moraes ◽  
Marcelo C L Cohen ◽  
Igor Charles C. Alves ◽  
Marlon Carlos França ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sea Level ◽  
Sedimentary Organic Matter ◽  
Northeastern Brazil ◽  
C3 Plants ◽  
Terrestrial Organic Matter ◽  
Stable Isotopic ◽  
Southern Bahia ◽  
Mangrove Dynamics ◽  
A Site

AbstractThe aim of this paper is to evaluate the compatibility between the Holocene relative sea-level (RSL) curves proposed for the Brazilian littoral and mangrove dynamics along a fluvial valley in the state of southern Bahia. This was done integrating geomorphological, sedimentological, palynological, and stable isotopic data from two cores collected at the mouth of the Jucuruçu River and at a site 23 km inland, near the city of Prado, northeastern Brazil. Core PR07, sampled from a fluvial plain at about 4.5±1 m above the RSL, reveals mangrove pollen (5–20%) and estuarine/terrestrial organic matter (δ13C=~–25‰, C/N=7.3–67) between 4.5 m (~7400 cal yr BP) and 1.75 m depth (~5350 cal yr BP). Core PR11, sampled from a mangrove tidal flat, also revealed mangrove pollen taxa (5-28%) since 660 cal yr BP. Core PR07 indicated absence of mangrove pollen and increase of sedimentary organic matter sourced from terrestrial C3 plants (δ13C=~–27‰, C/N=22–159) during the last 5350 cal yr BP. Probably, the changes in vegetation and sedimentary organic matter identified in core PR07 were caused by the combined effects of the RSL fluctuations, with a highstand at about 5350 cal yr BP of 2.7±1.35 m, and changes in fluvial discharge.

scholarly journals Recognition of High-Frequency Sea-Level Fluctuations in Late Silurian to Early Permian Deposits, Perlis, Malaysia.

2021 ◽  
Author(s):  
Nurul Syazwin Zamri ◽  
Ying Jia Teoh ◽  
Khalf Khiri AbuBakr ◽  
Meor Hakif Amir Hassan ◽  
Nur Azwin Ismail ◽  
...  
Keyword(s):  
Sea Level ◽  
Progressive Increase ◽  
Sediment Supply ◽  
Third Order ◽  
Sea Level Fluctuations ◽  
Subsidence Rate ◽  
Accommodation Space ◽  
Present Information ◽  
Stacking Patterns

Abstract The purpose of this paper is to present information on the past sea-level fluctuations of sedimentary rock succession of the Perlis area that covers the Mempelam Limestone, Timah Tasoh Formation, Sanai Limestone, Telaga Jatoh Formation, Kubang Pasu Formation, and Chuping Formation at Bukit Tungku Lembu and Guar Sanai, Perlis, Malaysia. Based on sedimentology logging, cycle stacking patterns, and accommodation variations revealed by Fischer plots, 51 cyclic sequences of third-order depositional sequences are recognized. These sequences generally consist of transgressive and regressive events. As the thickness of the cycle column increases, it forms an increase in accommodation space and subsidence rate and results in rising sea level. As the thickness of the cycle column decreases, it will form a decrease in accommodation space and subsidence rate and resulting in sea-level fall. Generally, the facies of the cycle are vertically arranged, forming coarsening and fining upward patterns observed from sedimentology logging. The Silurian Mempelam Limestone-Carboniferous Chepor Member sequence is characterized by a progressive increase and decrease in accommodation space, indicating a rise and fall in sea level. In contrast, the Carboniferous Uppermost Kubang Pasu-Permian Chuping Limestone sequence is characterized by a progressive decrease in accommodation space, indicating a longer-term fall in sea level. The regressive-transgressive cycles recognize deviations in the accommodation space and sediment supply from the cyclic successions. In turn, these cycles are expressing the long-term of Perlis’s sea-level fluctuations. The results notably reflect the cycles consistent with the long-term rising and falling trend on different regions globally in Paleozoic times.

The impact of Quaternary sea-level changes on the sedimentary organic matter of the Paraíba do Sul Deltaic Complex area, southeastern Brazil

2019 ◽  
Vol 95 ◽  
pp. 102274 ◽  
Author(s):  
Marcelo de A. Carvalho ◽  
Josiane B. Plantz ◽  
Thiago G. Carelli ◽  
Gustavo Santiago ◽  
Viviane S.F. Trindade ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sea Level ◽  
Sedimentary Organic Matter ◽  
Southeastern Brazil ◽  
Sea Level Changes ◽  
The Impact
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