Longitudinal Draa in The Permian Yellow Sands of North-Fast England

Steele, Richard

doi:10.1016/s0070-4571(08)70812-4

Cited by 26 publications

(16 citation statements)

References 6 publications

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“…Even in onshore areas where good three-dimensional exposures of Rotliegend aeolian sequences exist, the morphology of the formative dunes is still a controversial topic. The Yellow Sands of County Durham for example, have been variously interpreted as seif dunes (Smith & Francis 1967;Glennie 1970;Glennie & Provan 1990) or longitudinal draa (Steele 1983) and complex transverse dunes (Yardley 1984). Similarly the Bridgnorth Sandstone of Shropshire was originally interpreted as the deposits of simple barchan dunes (Shotton 1937) while more recently the formation has been reinterpreted as the deposits of either oblique dunes (Sneh 1988) or a combination of transverse and barchanoid draa with superimposed oblique crescentic and linear dunes (Karpeta 1990).…”

Section: Aeolian Depositional Regimesmentioning

confidence: 99%

A new lithostratigraphy and depositional model for the Upper Rotliegend of the UK Sector of the Southern North Sea

George

Berry²

1993

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The lack of a pragmatic basin-wide lithostratigraphic subdivision for the Upper Rotliegend of the Southern North Sea Basin has presented numerous problems when attempting to correlate wells or implement reservoir zonation schemes within this important gas province. This deficiency has also made it extremely difficult to predict facies distribution, and thus reservoir quality, when generating or assessing new prospects. With this in mind, a detailed study of the cores and logs from 126 released wells from the UK sector of the gas province was undertaken. The results of this study suggest that it is possible to subdivide the Upper Rotliegend into five lithostratigraphic units (Units 1-5 from oldest to youngest) based on the recognition of drying-upward cycles. These drying-upward cycles are developed throughout the basin in both the Leman Sandstone and Silverpit Claystone Formations. They are considered to reflect long term fluctuations in the Rotliegend climate and thus they have important chronostratigraphic implications. In any given well the numbers of drying-upward cycles (or alternatively lithostratigraphic units) actually developed, the nature of their bounding surfaces and their component lithofacies are controlled by the position of that well within the depositional basin. Utilizing the new subdivision as a stratigraphic framework it has been possible to construct detailed lithofacies maps for the five units. These maps have revealed the complex tectonic and sedimentary evolution of the Rotliegend basin and they have also suggested a new depositional model for the fluvial facies association. The tectonic evolution of the basin has been traced by analysing the spatial and temporal distribution of the various units and their component facies.

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Section: Aeolian Depositional Regimesmentioning

confidence: 99%

A new lithostratigraphy and depositional model for the Upper Rotliegend of the UK Sector of the Southern North Sea

George

Berry²

1993

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“…Palaeoergs in Europe have been reported from the Permian (e.g. Glennie & Buller, 1983;Steele, 1983;Mader & Yardley, 1985;Clemmensen & Abrahamsen, 1983;Frederiksen et al, 1998;Clemmensen & Hegner, 1991) and the Triassic (e.g. Thompson, 1969;Mountney & Thompson, 2002;Uličný, 2004).…”

Section: Introductionmentioning

confidence: 99%

Aeolian sand sea development along the mid‐Cretaceous western Tethyan margin (Spain): erg sedimentology and palaeoclimate implications

Rodríguez‐López¹,

Meléndez²,

Boer

et al. 2008

Sedimentology

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The existence of a mid‐Cretaceous erg system along the western Tethyan margin (Iberian Basin, Spain) was recently demonstrated based on the occurrence of wind‐blown desert sands in coeval shallow marine deposits. Here, the first direct evidence of this mid‐Cretaceous erg in Europe is presented and the palaeoclimate and palaeoceanographic implications are discussed. The aeolian sand sea extended over an area of 4600 km2. Compound crescentic dunes, linear draa and complex aeolian dunes, sand sheets, wet, dry and evaporitic interdunes, sabkha deposits and coeval extradune lagoonal deposits form the main architectural elements of this desert system that was located in a sub‐tropical arid belt along the western Tethyan margin. Sub‐critically climbing translatent strata, grain flow and grain fall deposits, pin‐stripe lamination, lee side dune wind ripples, soft‐sediment deformations, vertebrate tracks, biogenic traces, tubes and wood fragments are some of the small‐scale structures and components observed in the aeolian dune sandstones. At the boundary between the aeolian sand sea and the marine realm, intertonguing of aeolian deposits and marine facies occurs. Massive sandstone units were laid down by mass flow events that reworked aeolian dune sands during flooding events. The cyclic occurrence of soft sediment deformation is ascribed to intermittent (marine) flooding of aeolian dunes and associated rise in the water table. The aeolian erg system developed in an active extensional tectonic setting that favoured its preservation. Because of the close proximity of the marine realm, the water table was high and contributed to the preservation of the aeolian facies. A sand‐drift surface marks the onset of aeolian dune construction and accumulation, whereby aeolian deposits cover an earlier succession of coastal coal deposits formed in a more humid period. A prominent aeolian super‐surface forms an angular unconformity that divides the aeolian succession into two erg sequences. This super‐surface formed in response to a major tectonic reactivation in the basin, and also marks the change in style of aeolian sedimentation from compound climbing crescentic dunes to aeolian draas. The location of the mid‐Cretaceous palaeoerg fits well to both the global distribution of other known Cretaceous erg systems and with current palaeoclimate data that suggest a global cooling period and a sea‐level lowstand during early mid‐Cretaceous times. The occurrence of a sub‐tropical coastal erg in the mid‐Cretaceous of Spain correlates with the exposure of carbonate platforms on the Arabian platform during much of the Late Aptian to Middle Albian, and is related to this eustatic sea‐level lowstand.

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“…They un der lie a sys tem of lin ear compound dunes and oc cur at the top of the com pound dunes (Steele, 1983;Chrintz and Clemmensen, 1993), which rep resent the up per most se quence of the Rotliegend de pos its overlain by the Zechstein Marl Slate. In west ern Eng land, an 8 m thick Perm ian low-an gle sand sheet was de scribed.…”

Section: Depositional Cycles Palaeoclimatic Cycles and The Phenomenomentioning

confidence: 99%

Sand sheets interaction with aeolian dune, alluvial and marginal playa beds in Late Permian Upper Rotliegend setting (western part of the Poznań Basin, Poland)

Kiersnowski

Buniak

2017

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A., 2016. Sand sheets in ter ac tion with ae olian dune, al lu vial and mar ginal playa beds in Late Permian Up per Rotliegend set ting (west ern part of the Poznañ Ba sin, Po land). Geo log i cal Quar terly, 60 (4): 771-800, doi: 10.7306/gq.1336The Up per Rotliegend de pos its of the west ern part of the Poznañ Ba sin, Po land, rep re sent three main sed i men tary en vi ronments: ae olian desert (dunes and sand sheets), al lu vial plain (al lu vial cov ers with wadi de pos its) and mar ginal playa. In arid pe ri ods, dunes prograded into ar eas dom i nated by al lu vial sed i men ta tion. Dur ing wet pe ri ods, al lu vial de pos its eroded the ae olian de pos its and prograded onto dune fields. Playa sed i ments were de pos ited among ae olian or al lu vial sed i ments during pe ri odic ex pan sions of the playa. These aeolian, allu vial and playa de pos its are ar ranged in depositional se quences. Bound aries be tween se quences are marked by rapid changes in depositional fa cies; and by ero sional bound ing sur faces. Max i mum Wet ting Sur faces have been dis tin guished within some parts of the depositional se quences, which en able regional cor re la tions. The sec tions stud ied are com posed of thick se quences of sand and sand-gravel sheets. The sand sheets rep re sent pe ri ods of strati graphic con den sa tion. Sys tems of sand sheets are typ i cal of mar ginal ar eas of ergs. We dis tin guish nine depositional com plexes (units) num bered 1-9 from base to top, re spec tively. These sub di vi sions are based on the in ter pre ta tion of the sedimentological re cord in palaeoclimatic terms, and in terms of ma jor ero sional bound aries, which are prob a bly of re gional ex tent. In the ae olian de pos its, ma jor bound aries are as so ci ated with de fla tion sur faces related to the sta bi li za tion of ground wa ter lev els. In the mar ginal playa de pos its, the most im por tant bound aries are cor re lated to transgressive sur faces that de vel oped dur ing playa ex pan sion. Time gaps rep re sented by the bound aries and the scale of ero sion be low them, are dif fi cult to es ti mate. The depositional sys tem of the Up per Rotliegend was dom i nated by sand and sand-gravel sheets, and is ei ther a unique fea ture in the en tire South ern Perm ian Ba sin or, as we as sume, sand sheets oc cur more com monly in the Rotliegend than has been pre vi ously thought.

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Longitudinal Draa in The Permian Yellow Sands of North-Fast England

Cited by 26 publications

References 6 publications

A new lithostratigraphy and depositional model for the Upper Rotliegend of the UK Sector of the Southern North Sea

A new lithostratigraphy and depositional model for the Upper Rotliegend of the UK Sector of the Southern North Sea

Aeolian sand sea development along the mid‐Cretaceous western Tethyan margin (Spain): erg sedimentology and palaeoclimate implications

Sand sheets interaction with aeolian dune, alluvial and marginal playa beds in Late Permian Upper Rotliegend setting (western part of the Poznań Basin, Poland)

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