Sedimentology and Sequence Stratigraphy of the Agrio Formation (Late Valanginian–Earliest Barremian) and the Closure of the Mendoza Group to the North of the Huincul High

2020 ◽  
pp. 237-265
Author(s):  
Pablo José Pazos ◽  
Marcos Comerio ◽  
Diana Elizabeth Fernández ◽  
Carolina Gutiérrez ◽  
María Candela González Estebenet ◽  
...  
Keyword(s):  
Sequence Stratigraphy ◽  
The North

OLIGOCENE AND MIOCENE SEQUENCE STRATIGRAPHY OF THE NORTH MALAY BASIN, MALAYSIA AND THAILAND

2019 ◽  
Author(s):  
G. Brink ◽  
J. Hernandez ◽  
J. Bencomo ◽  
L. Jiang ◽  
N. Koronful ◽  
...  
Keyword(s):  
Sequence Stratigraphy ◽  
The North

Subsidence of the Atlantic Moroccan margin during the Mesozoic

1998 ◽  
Vol 35 (4) ◽  
pp. 476-493 ◽  
Author(s):  
P Le Roy ◽  
F Guillocheau ◽  
A Piqué ◽  
A M Morabet
Keyword(s):  
Sequence Stratigraphy ◽  
North Atlantic ◽  
North Atlantic Region ◽  
Atlantic Region ◽  
The North ◽  
Essaouira Basin ◽  
High Resolution Analysis ◽  
Differential Behaviour ◽  
The North Atlantic ◽  
Well Correlation

This paper presents a combined study based on seismic interpretation, sequence stratigraphy, and the evaluation of subsidence that aims to characterize the structure and development of the Essaouira Basin in Morocco. Located in the coastal Meseta adjoining the continental margin, this basin records an initial Carnian-Hettangian deformation phase during rifting in the central part of the North Atlantic region. The geometry of the basin as a function of time shows a succession of half-grabens and horsts that developed westwards from reactivated Hercynian structures. The postrift stage is characterized by an aggrading sedimentary sequence, as shown by concordant seismic sequences stacking over the onshore part of the basin. The Upper Cretaceous coincides with a sequence showing a transition towards a prograding regime that leads to the topography of the present-day margin. Using the high-resolution analysis provided by sequence stratigraphy, it is possible to recognize fine-scale stratigraphic variations in the sedimentary succession. The well-to-well correlation of sedimentary cycles forms a dataset for evaluating subsidence. Residual subsidence curves reveal a differential behaviour between the present onshore and offshore areas. Although the computed subsidence rates are low across the onshore zone, curves for the western offshore part of the basin follow theoretical lithospheric cooling curves that are compatible with a stretch factor ( beta ) of nearly 1.4. Steep temporary gradients on the computed curves may be correlated with tectonic phases documented across the North Atlantic region that exerted a tight control on the development of the Essaouira Basin from Triassic rifting until the uplift of the Atlas Mountains during the Cenozoic.

Sequence Stratigraphy of the North German Rotliegende

AAPG Bulletin ◽  
1993 ◽  
Vol 77 ◽  
Author(s):  
GAST, REINHARD E., BEB Erdgas und E
Keyword(s):  
Sequence Stratigraphy ◽  
The North

Lithostratigraphy, sedimentary evolution and sequence stratigraphy of the Upper Proterozoic Lyell Land Group (Eleonore Bay Supergroup) of East and North-East Greenland

1997 ◽  
pp. 1-60
Author(s):  
Henrik Tirsgaard ◽  
Martin Sønderholm
Keyword(s):  
Sequence Stratigraphy ◽  
Large Scale ◽  
Middle Part ◽  
East Greenland ◽  
North East ◽  
The North ◽  
Upper Proterozoic ◽  
Sedimentary Evolution ◽  
Facies Associations ◽  
Cyclic Changes

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Tirsgaard, H., & Sønderholm, M. (1997). Lithostratigraphy, sedimentary evolution and sequence stratigraphy of the Upper Proterozoic Lyell Land Group (Eleonore Bay Supergroup) of East and North-East Greenland. Geology of Greenland Survey Bulletin, 178, 1-60. https://doi.org/10.34194/ggub.v179.5076 _______________ The Late Proterozoic Lyell Land Group is an approximately 3 km thick succession of siliciclastic shelf deposits, within the upper part of the Eleonore Bay Supergroup. It is widely exposed in the region between Ardencaple Fjord in the north and Canning Land in the south. In this paper the seven formations named by Sønderholm & Tirsgaard (1993) are formally described. These are from base to top: the Kempe Fjord Formation (400-600 m thick), the Sandertop Formation (200-405 m thick), the Berzelius Bjerg Formation (250-450 m thick), the Kap Alfred Formation (500-640 m thick), the Vibeke Sø Formation (290-325 m thick), the Skjoldungebrae Formation (205-240 m thick) and the Teufelsschloss Formation (35-110 m thick). Five facies associations have been recognised. Outer shelf deposits dominated by dark green, brown to dark red mudstones with thin sandstone lenses are mainly found in the Sandertop, Kap Alfred and Skjoldungebræ Formations. Storm- and wave-dominated inner shelf deposits comprising fine-grained sandstones and dark heterolithic mudstones are common in the Sandertop, Kap Alfred, Vibeke Sø and Skjoldungebrae Formations and are also found in southern outcrops of the Teufelsschloss Formation. Tidally influenced shoreface deposits form stacks of laterally extensive sandstone bodies separated by heterolithic mudstones and are only found in the middle part of the Kap Alfred Formation. Storm- and wave-dominated shoreface deposits comprise highly mature, thick and laterally very extensive sandstone bodies of which a few may be traced for distances exceeding 150 km. This association is present in several intervals within all formations of the Lyell Land Group. Tidally dominated coastal plain deposits consist of stacked sandstone sheets forming laterally extensive, multistorey units separated by heterolithic mudstones and sandstones. These sediments form part of the Kempe Fjord and Berzelius Bjerg Formations and are also found in northern outcrops of the Teufelsschloss Formation. Evidence from palaeocurrent data combined with regional lithological variations suggest a consistent general N-S coastline with the basin deepening in an eastward direction. Deflection of geostrophic currents suggest a palaeolatitude on the southern hemisphere. The deposits of the Lyell Land Group are subdivided into four, large-scale sequences which overall show the same general sedimentary evolution through time reflecting large-scale, cyclic changes in relative sea-level. The sequences vary in thickness from 400-1000 m and are all readily traceable 300 km parallel and 100 km perpendicular to inferred palaeocoastline. The development of all sequences indicates that major regional translation of facies are related to large-scale forced regressions. Sequence stratigraphic considerations suggest that correlation of formations of the Lyell Land Group with units of the Petermann Bjerg Group some 75 km to the west may be very difficult to carry out. Citation: Tirsgaard, H. & Sønderholm, M. 1997: Lithostratigraphy, sedimentary evolution and sequence stratigraphy of the Upper Proterozoic Lyell Land Group (Eleonore Bay Supergroup) of East and North-East Greenland. Geology of Greenland Survey Bulletin 178, 60 pp.

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