Oceanographic controls on shallow‐water temperate carbonate sedimentation: Spencer Gulf, South Australia

Sedimentology ◽  
2015 ◽  
Vol 63 (1) ◽  
pp. 105-135 ◽  
Author(s):  
Laura G. O'Connell ◽  
Noel P. James ◽  
Mark Doubell ◽  
John F. Middleton ◽  
John Luick ◽  
...  
Keyword(s):  
Shallow Water ◽  
South Australia ◽  
Carbonate Sedimentation ◽  
Temperate Carbonate

scholarly journals Upper Barremian-Lower Aptian Urgonian limestone's in the Rakova bara section (Carpatho-balkanides, NE Serbia): Analysis and comparison with adjacent areas

2010 ◽  
Vol 90 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Ivana Carevic ◽  
Darivojka Ljubovic-Obradovic ◽  
Monika Bozinovic ◽  
Velimir Jovanovic
Keyword(s):  
Shallow Water ◽  
Benthic Foraminifera ◽  
Carbonate Sedimentation ◽  
Lower Aptian ◽  
First Time ◽  
Water Carbonate ◽  
Shallow Water Carbonate

The Upper Barremian-Lower Aptian succession is recorded from a limestone sequence that crops out in the surrounding of Rakova Bara in the Carpatho-Balkanides range in northeastern Serbia. The micropalaeontological and sedimentological studies lead to recognition of the two types of microfacies. The benthic foraminiferal association consists of Vercorsella laurentii, Rumanoloculina robusta, Praechrysalidina infracretaceae, Dictyoconus gr. arabicus, Debarina hahounerensis, Charentia cuvilieri and Pseudocyclammina lituus that confirm the stratigraphical and palaeoenvironmental connection of the microfossil assemblages with the classical Urgonian-type, shallow-water carbonate sedimentation. The association documented for the first time in the study area is considered typical of the Tethyan Realm. The stratigraphical position of the benthic foraminifera species within the Upper Barremian-Lower Aptian interval is discussed. The Urgonian Limestone's of the studied section are comparable with adjacent areas of eastern Serbia and Romanian South Carpathians. .

Lacustrine Sedimentation in a Semiarid Alpine Setting: An Example from Ladakh, Northwestern Himalaya

1989 ◽  
Vol 31 (3) ◽  
pp. 332-350 ◽  
Author(s):  
Monique Fort ◽  
Douglas W. Burbank ◽  
Pierre Freytet
Keyword(s):  
Shallow Water ◽  
Debris Flows ◽  
Arid Environment ◽  
Alpine Lakes ◽  
Marked Contrast ◽  
Semiarid Environment ◽  
Lacustrine Sedimentation ◽  
Carbonate Sedimentation ◽  
Semi Arid

AbstractThe Lamayuru lacustrine strata in Ladakh typify many of the carbonate-rich Pleistocene alpine lakes found in the semiarid environment of the northern Himalaya. Created by a 200-m-thick landslide, the lake was in existence by at least 35,000 yr ago, and may have persisted until 500–1000 yr ago. Represented in the center by thin turbidites and laminated muds, the lacustrine sedimentation along the lake margins and low-relief deltas characteristically displays a marked contrast between (1) clastic lenses representing rapid, sporadic, matrix-poor debris flows and periglacial inputs from the alpine slopes and (2) abundant, diverse, shallow-water, biologically dominated carbonate strata, among which organism-rich, chalky beds and oncolithic and encrusted stem-rich strata predominate. Resemblances of the Lamayuru lacustrine strata and their setting to those of former lakes throughout areas north of the Greater Himalayan crest suggest that the alpine, semi-arid environment would favor diversified, spacially restricted carbonate sedimentation punctuated by occasional clastic influxes. Such a depositional regime contrasts strongly with that found immediately south of the Himalayan crest where more humid conditions promote a more continuous clastic influx into intramontane lakes.

scholarly journals Distribution of brachiopods in the Lower Visean deposits in the Eastern Urals

LITOSFERA ◽  
2019 ◽  
pp. 59-80
Author(s):  
N. A. Kucheva
Keyword(s):  
Shallow Water ◽  
Abiotic Factors ◽  
Early Carboniferous ◽  
Benthic Organisms ◽  
Carbonate Sedimentation ◽  
Entire Structure ◽  
Composition And Structure ◽  
Verkhnyaya Kardailovka ◽  
Marine Basins ◽  
Time Boundary

Subject. This paper is aimed at investigating the distribution of brachiopods across the stratotypes of the Lower Visean regional substages and formations, as well as of the Upper Visean Zhukovsky regional substage, which are presently located in the East Uralian and Magnitogorskian megazones of the Eastern Urals. Materials and methods. Brachiopods were one of the most numerous groups of benthic organisms inhabiting the Early Carboniferous marine basins now located in the eastern Urals. This paper presents information on the distribution of brachiopods across the carbonate and carbonate-terrigenous facies of the Middle (Pokrovskoe, Zhukovo, Smolino, Brod-Kljuchiki) and Southern (Nizhnyaya Gusikha, Verkhnyaya Kardailovka, Kipchak, Ust-Grekhovka and Khudolaz) Urals sections.Results. It is found that Delepinеа lebedevi, D. comoides, Ovatia markovskii and Composita sp. were the domineering species during the Early Visean period. The Ust-Grekhovsky time marked the appearance of migrant species, which resulted not only in a decrease in the proportion of Delepinеа and Ovatia but also significantly changed the entire structure of the local brachiopod communities. The evolutionary transformation of the Ovatia genus at the Ust-Grekhovsky–Zhukovsky time boundary led to the appearance of the Linoprotonia genus and subsequently to the Globosoproductus genus (the first representative of the Gigantoproductini). The Zhukovsky period was characterized by a continuing reorganization of the composition and structure of the communities, featuring a change in the dominant taxa. The Linoprotonia and Globosoproductus genera became widespread. Rare representatives of the Gigantoproductus, Datangia and Semiplanus genera appeared.Conclusions. A direct correlation between the diversity of brachiopod associations and abiotic factors is found. The most diverse associations represented by the taxa of several orders, including Gigantoproductini, inhabited shallow-water environments with carbonate sedimentation. The evolution of brachiopods over the Early Visean and Zhukovsky periods of the Late Visean was characterized by natural succession in the composition of genera and species, with the most significant alteration having occurred in the Ust-Grekhovsky and Zhukovsky periods.

scholarly journals Stratigraphy and sedimentology of the Zechstein carbonates of southern Jylland, Denmark

1988 ◽  
Vol 26 ◽  
pp. 1-32
Author(s):  
Lars Stemmerik ◽  
Peter Frykman
Keyword(s):  
Energy Level ◽  
Shallow Water ◽  
Upper Permian ◽  
Carbonate Sedimentation ◽  
Depositional System ◽  
Carbonate Deposition ◽  
Water Conditions ◽  
Basin System ◽  
Depositional Models

The Upper Permian Zechstein succession of southern Jylland, Denmark, is composed of a cyclic repetition of carbonate, anhydrite and salt, and includes four main carbonate units: Ca-la, Ca-lb, Ca-2 and Ca-3. The stratigraphy and log-correlation in the southern Jylland area is outlined and compared to other areas. Descriptions of facies and interpretation of depositional models for the four carbonate units are presented. The depositional system comprised a shelf with marginal sabkha evaporites and carbonates; the shelf underwent evolution from a ramp-like to a platform configuration. This evolution is seen as the result of the interplay between evaporite and carbonate sedimentation. Accumulation of sulphate evaporites during Z-1 times produced a sediment body with a platform morphology. Z-2 carbonate deposition further enhanced the platform configuration, with consequent development of a marked zonation of facies according to energy level. Later in Z-2 time the platform - basin system suffered demise as the basinal areas were filled with halite and during the remaining period of basinal history shallow water conditions prevailed throughout the area.

scholarly journals Maratus nemo: A new wetland species of peacock spider from South Australia (Araneae, Salticidae, Euophryini)

2021 ◽  
Vol 5 (1) ◽  
pp. 71-80
Author(s):  
Joseph Schubert
Keyword(s):  
Social Media ◽  
New Species ◽  
Shallow Water ◽  
South Australia ◽  
Ephemeral Wetland ◽  
Social Media Engagement ◽  
Wetland Species ◽  
A New Species

A new species of peacock spider, Maratus nemosp. nov., is described from the vicinities of Mount McIntyre and Nangwarry, South Australia. Unusual among members of its genus, the new species appears to inhabit ephemeral wetland complexes on marshy vegetation in shallow water. The discovery of Maratus nemosp. nov. is one of several recently described species attributed to the growing interest in amateur invertebrate macrophotography, with putative new species brought to attention of taxonomists through social media engagement.

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