Sedimentary facies of the Forest Marble (Bathonian), Shipton-on-Cherwell Quarry, Oxfordshire

1973 ◽  
Vol 110 (2) ◽  
pp. 153-163 ◽  
Author(s):  
J. R. L. Allen ◽  
P. Kaye
Keyword(s):  
Sedimentary Facies ◽  
Tidal Channels ◽  
Marine Sand ◽  
Hard Substrates

SummaryThe unrivalled exposures of the quarry show the Forest Marble to comprise a complex association of vertically and laterally changing facies. These are interpreted to represent environments ranging from subtidal-intertidal fully marine sand shoals and hard substrates colonized by corals, to mud flats and tidal channels associated with coastal swamps. An earlier interpretation of calcarenites in the Forest Marble is inapplicable at Shipton-on-Cherwell.

Recent sediments and sedimentation in the Inner Hebrides

1983 ◽  
Vol 83 ◽  
pp. 91-105
Author(s):  
George E. Farrow
Keyword(s):  
Sea Urchins ◽  
Sedimentary Facies ◽  
Nodule Formation ◽  
Tidal Channels ◽  
Rock Fragments ◽  
Outer Hebrides ◽  
Beach Sands ◽  
Underwater Television ◽  
Tidal Streams ◽  
Recent Sediments

SynopsisLittle land-derived material currently reaches the sea. Inland deposits are dominantly organic, peat succeeding lacustrine diatomite. Marine sediments result from the wave and tidal current reworking of Pleistocene glacial debris, with an admixture of Holocene skeletal carbonate. Muddy sands are accumulating in glacially overdeepened and tidally scoured hollows, reworked from moraine and outwash. Lag gravels occur on the shallows.Beach sands have a local origin, with mixtures of shelly fauna and rock fragments eroded from adjacent cliffs. Beaches are less carbonate-rich than in the Outer Hebrides, except on Coll and Tiree. They are also finer, which encourages well-developed dune systems. Calcareous dunes are locally cemented on Coll, the cementation picking out ‘fossilised’ hoof-prints.There is no transport of coastal bedload to the shelf, so that offshore sediments are more calcareous. Bivalves, barnacles, gastropods, worm tubes and sea urchins make significant contributions to the shellsand. Underwater television surveys show a diverse suite of sedimentary facies: algal gravels in shallow, sheltered tidal channels; carbonate-rich sand ribbons and sandwaves along the main tidal streams; highly burrowed muds in the deeper, lower energy areas, with many examples of penecontemporaneous nodule formation.

Benthic foraminiferal zonation in deep-water carbonate platform margin environments, northern Little Bahama Bank

1988 ◽  
Vol 62 (01) ◽  
pp. 1-8 ◽  
Author(s):  
Ronald E. Martin
Keyword(s):  
Deep Water ◽  
Benthic Foraminifera ◽  
Carbonate Platform ◽  
Sedimentary Facies ◽  
Depositional Environments ◽  
Near Surface ◽  
Sediment Gravity Flows ◽  
Gravity Flows ◽  
Platform Margin ◽  
Water Carbonate

The utility of benthic foraminifera in bathymetric interpretation of clastic depositional environments is well established. In contrast, bathymetric distribution of benthic foraminifera in deep-water carbonate environments has been largely neglected. Approximately 260 species and morphotypes of benthic foraminifera were identified from 12 piston core tops and grab samples collected along two traverses 25 km apart across the northern windward margin of Little Bahama Bank at depths of 275-1,135 m. Certain species and operational taxonomic groups of benthic foraminifera correspond to major near-surface sedimentary facies of the windward margin of Little Bahama Bank and serve as reliable depth indicators. Globocassidulina subglobosa, Cibicides rugosus, and Cibicides wuellerstorfi are all reliable depth indicators, being most abundant at depths >1,000 m, and are found in lower slope periplatform aprons, which are primarily comprised of sediment gravity flows. Reef-dwelling peneroplids and soritids (suborder Miliolina) and rotaliines (suborder Rotaliina) are most abundant at depths <300 m, reflecting downslope bottom transport in proximity to bank-margin reefs. Small miliolines, rosalinids, and discorbids are abundant in periplatform ooze at depths <300 m and are winnowed from the carbonate platform. Increased variation in assemblage diversity below 900 m reflects mixing of shallow- and deep-water species by sediment gravity flows.

ACCUMULATION-DEFLATIONARY PROCESSES ON MARINE SAND BARS COASTS OF THE SOUTHERN-EAST BALTIC

2018 ◽  
Author(s):  
Е. Бадюкова ◽  
E. Badyukova ◽  
Леонид Жиндарев ◽  
Leonid Zhindarev ◽  
Светлана Лукьянова ◽  
...  
Keyword(s):  
Sand Bars ◽  
Marine Sand ◽  
Wave Erosion ◽  
Dune Ridge ◽  
Sea Wave ◽  
Sea Coast

Modern accumulative and deflation forms of a coastal eolian relief on the sea coast of Kuronian and Vistula Spits are considered. It is established that on coastal barriers there are at the same time processes of accretion and degradation of a dune ridge and leaned against it foredune. Alternation of stable and erosive sites of a dune ridge is revealed. The last has destruction signs as with sea (wave erosion), and from the land side where the whirls of a wind stream creating numerous deflation basins in dune ridge have great value.

Late Permian carbonate concretions in the marine siliciclastic sediments of the Ravnefjeld Formation, East Greenland

2002 ◽  
pp. 126-132
Author(s):  
Jesper Kresten Nielsen ◽  
Nils-Martin Hanken
Keyword(s):  
Mineral Resources ◽  
Sedimentary Basins ◽  
Sedimentary Facies ◽  
Carbonate Reservoir ◽  
Upper Permian ◽  
Late Permian ◽  
East Greenland ◽  
Reservoir Rocks ◽  
Carbonate Concretions ◽  
Siliciclastic Sediments

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Kresten Nielsen, J., & Hanken, N.-M. (2002). Late Permian carbonate concretions in the marine siliciclastic sediments of the Ravnefjeld Formation, East Greenland. Geology of Greenland Survey Bulletin, 191, 126-132. https://doi.org/10.34194/ggub.v191.5140 _______________ This investigation of carbonate concretions from the Late Permian Ravnefjeld Formation in East Greenland forms part of the multi-disciplinary research project Resources of the sedimentary basins of North and East Greenland (TUPOLAR; Stemmerik et al. 1996, 1999). The TUPOLAR project focuses on investigations and evaluation of potential hydrocarbon and mineral resources of the Upper Permian – Mesozoic sedimentary basins. In this context, the Upper Permian Ravnefjeld Formation occupies a pivotal position because it contains local mineralisations and has source rock potential for hydrocarbons adjacent to potential carbonate reservoir rocks of the partly time-equivalent Wegener Halvø Formation (Harpøth et al. 1986; Surlyk et al. 1986; Stemmerik et al. 1998; Pedersen & Stendal 2000). A better understanding of the sedimentary facies and diagenesis of the Ravnefjeld Formation is therefore crucial for an evaluation of the economic potential of East Greenland.

EVOLUTION OF SEDIMENTARY FACIES AND PALEOENVIRONMENT DURING THE LATE QUATERNARY IN WANQINGSHA AREA OF THE PEARL RIVER DELTA

2010 ◽  
Vol 29 (6) ◽  
pp. 35-42
Author(s):  
Jianhua WANG ◽  
Linglong CAO ◽  
Xiaojing WANG ◽  
Xiaoqiang YANG ◽  
Jie YANG ◽  
...  
Keyword(s):  
Pearl River Delta ◽  
Late Quaternary ◽  
Sedimentary Facies ◽  
River Delta ◽  
Pearl River ◽  
The Pearl River Delta ◽  
The Pearl River
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