scholarly journals Sedimentological and Palynological Approach for Determining the Depositional Environment of the Outcropping Surma Group Mudrocks in the Sitakund Anticline, Chittagong-Tripura Fold Belt, Bangladesh

2018 ◽  
Vol 66 (1) ◽  
pp. 37-42
Author(s):  
Md Yousuf Gazi ◽  
Subrota Kumar Saha ◽  
SM Mainul Kabir ◽  
Md Badrul Imam
Keyword(s):  
Depositional Environment ◽  
Fold Belt ◽  
Shore Level ◽  
Anticlinal Structure ◽  
Palynological Assemblages ◽  
Pollen And Spores ◽  
Surma Group ◽  
Surrounding Areas ◽  
Comprehensive Study

Sitakund anticlinal structure exposes about 1.5 km of Surma group sediments and has been chosen for a comprehensive study of the mudrocks depositional environment based on sedimentological and palynological evidences. Five mudrock facies have been identified in this region. They are Mudstone Dominated, Sand/Silt Streaked Shale, Fissile Shale, Laminated Shale and Lenticular Bedded Shale. The palynological assemblages from these samples have been analyzed qualitatively, and a variety of pollen, spores, algae and fungi identified. The pollen and spores have been attributed to parent plants located at the immediate and more regional surrounding areas during the deposition of these sediments. Palynological assemblages incorporates ample of Palmae grains such as spores in the Palmipollenites and Proxaperites and predominance of pteridophytic spores. The occurrences and abundances of these pollens indicate that the deposition of the Surma mudrocks took place at the proximity of the shore level. Coastal fluvial environment is also triumphed after the previous depositional event which is apparent by the occurrence of palynomorphs of pteridophytes, angiosperms and algal origin. Dhaka Univ. J. Sci. 66(1): 37-42, 2018 (January)

scholarly journals Age and Depositional Environment of Walat Formation Based on Palynological Analysis in Sukabumi Regency, West Java, Indonesia

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Rizki Satria Rachman ◽  
Winantris ◽  
Budi Muljana
Keyword(s):  
Data Analysis ◽  
Chemical Treatment ◽  
Depositional Environment ◽  
Treatment Method ◽  
Late Eocene ◽  
West Java ◽  
Palynological Analysis ◽  
First Occurrence ◽  
Pollen And Spores

AbstractWalat Formation is equivalent to Bayah Formation. This formation is the beginning of Bogor basin deposition. In this case, age and environment of this formation have been analyzed by previous researchers, but the results of age and environment interpretations have different ranges, especially from its palynological aspect which until now Walat Formation is rarely analyzed using this aspect. This research was conducted to identify the age and depositional environment of Walat Formation in Sukabumi region by using pollen and spores to confirm different interpretations of previous studies. Measure section was carried out in sampling and chemical treatment method was carried out to see palynomorph content in the rock. Furthermore, data analysis was carried out with range of interval zones and pollen grouping based on their environment.The results show that Walat Formation has Late Eocene age based on the interval zone between first occurrence of Verrucatosporites usmensis and Meyeripollis naharkotensis, and the last occurence of Proxapertites operculatus, Proxapertites cursus, and Cicatricosisporites eocenicus. Walat Formation has fluvial depositional environment characterized by the dominance of Proxapertites operculatus and Proxapertites cursus. The results of this study confirm that the Walat Formation has an Eocene age and a fluvial depositional environment from a palinological aspect.

Late Permian (Tatarian) fluvio-lacustrine successions in NW Anatolia (Zonguldak Terrane, Turkey): palaeogeographic implications

2016 ◽  
Vol 154 (5) ◽  
pp. 1073-1087 ◽  
Author(s):  
CENGİZ OKUYUCU ◽  
TATYANA K. DIMITROVA ◽  
MEHMET CEMAL GÖNCÜOĞLU ◽  
İBRAHİM GEDİK
Keyword(s):  
Plant Material ◽  
Depositional Environment ◽  
Middle Part ◽  
Black Shales ◽  
Variscan Belt ◽  
Late Permian ◽  
Shallow Marine ◽  
East European ◽  
Fine Grained ◽  
Palynological Assemblages

AbstractLate Permian fluvio-lacustrine successions of the Çakraz Formation in the Zonguldak Terrane between the regions of Akçakoca and Ereğli were investigated in order to describe the litho- and biostratigraphic properties and explain the depositional environment. The studied succession with black, dark-grey to greenish-grey shales, siltstones and limestones is named the Alaplı Member to distinguish it from the classical red clastic successions, which are tentatively named the Ereğli Member of the Çakraz Formation. The organic-rich black shales, mudstones and limestones of the Alaplı Member yielded palynological assemblages suggesting a Lopingian (Tatarian) age. The lack of any marine macro- or microfossils, the fine-grained character of the lithofacies with abundant plant material and the association of poorly sorted conglomerates in the middle part of the succession indicate possible deposition in a broad range of fluvial and lacustrine environments. Successions of similar age and depositional environment are known from the East European Variscan Belt in Bulgaria and Romania. Common successions were also developed in actively extending shallow-marine platforms on the NW Palaeotethyan margin at the end of the Permian Period.

scholarly journals Coal-bearing strata sequence stratigraphy of Paleogene Meihe Formation, Meihe Basin, NE China

2020 ◽  
Author(s):  
Yueyue Bai ◽  
Qingtian Lü ◽  
Zhaojun Liu ◽  
Pingchang Sun ◽  
Rong Liu ◽  
...  
Keyword(s):  
Depositional Environment ◽  
Channel Migration ◽  
Seismic Profiles ◽  
Coal Seams ◽  
Ne China ◽  
Third Order ◽  
Accommodation Space ◽  
Geochemical Properties ◽  
System Tracts ◽  
Comprehensive Study

Abstract The Meihe Basin is an important Paleogene coal-bearing basin located in the Dunhua-Mishan Fault Zone, northeastern China. Based on a comprehensive study of well logs, seismic profiles, cores and rock geochemical properties, three third-order sequences were identified in the Paleogene Meihe Formation of Meihe Basin. The two coal-bearing sequences are the Lower Coal-bearing Member of Sequence I and the Upper Coal-bearing Member of Sequence III. All three types of system tracts are developed in both sequences, i.e., the lowstand systems tract (LST), the transgressive systems tract (TST), and the highstand systems tract (HST). Typically, coal seams developed in the lake swamp environments with good thicknesses and continuity are economically attractive for mining. In the study area, they are primarily found in the TST and HST of Sequence I. These nice thick coal seams usually develop in an ideal stable depositional environment where organic matter accommodation space grows at a balanced rate with peat, in other words, free of sediment input or channel migration. The key findings of this study could provide guidance for the exploration of coal seams in the Meihe Basin and other similar basins.

scholarly journals Stratigraphy of Kendeng Zone in Miyono Village and Surrounding, Sekar District, Bojonegoro Regency, East Java, Indonesia

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Mutawif Ilmi Muwaffiqih ◽  
Wahyu Ardiansyah Nugraha ◽  
Irvan Fatarwin Lubis ◽  
Mochammad Indra Novian
Keyword(s):  
Benthic Foraminifera ◽  
Depositional Environment ◽  
Planktonic Foraminifera ◽  
Research Area ◽  
Geological Mapping ◽  
Laboratory Analysis ◽  
Petrographic Analysis ◽  
Accurate Data ◽  
Geological Structures ◽  
Surrounding Areas

This paper will comprehensively discuss the stratigraphy of the Kendeng Zone by using geological field mapping and laboratory analysis. The research area located in the Miyono Village and surrounding areas, Sekar District, Bojonegoro Regency, East Java with an area of 4x5 km2. Based on the geological mapping results obtained 160 points station with a variety of results in the form of tracking map of the research area. Laboratory analysis uses Embry and Klovan classification (1971), Pettijohn et al. (1987), and Mount (1985) for petrographic analysis, while paleontological analysis using Manual of Planktonic Foraminifera (Postuma, 1971) and Atlas of Benthic Foraminifera (Holbourn et al., 2013). This paper will show the differences between regional stratigraphy and the result, depositional environment, and its mechanism. Lithology units found grouping into nine units. The research area epoch ranged between N18-N23 (early Pliocene - Holocene) and the depositional environment from the lower bathyal to the terrestrial. The geological structures of the research area must be considered in the stratigraphic arrangement determination. Based on the analysis, the Kendeng Zone stratigraphic column was obtained and expected to provide accurate data of Kendeng Zone specifically around Miyono area.

scholarly journals Revision of the first Carboniferous palaeofloristic locality discovered in Argentina

2019 ◽  
Vol 59 (1) ◽  
pp. 3-17
Author(s):  
Gustavo Correa ◽  
Silvia N. Césari
Keyword(s):  
Interdisciplinary Approach ◽  
Early Carboniferous ◽  
Late Carboniferous ◽  
Shallow Marine ◽  
Marine Deposits ◽  
Palynological Assemblages ◽  
Plant Remains ◽  
Pollen And Spores ◽  
Polish Scientist ◽  
Plant Components

Abstract The first Carboniferous palaeofloristic locality recognized in Argentina is situated to the south of the Sierra Chica de Zonda in San Juan Province, Argentina. The fossiliferous site known as Retamito or Río del Agua provided plant remains which were studied by the Polish scientist Ladislaus Szajnocha in 1891. Szajnocha proposed an early Carboniferous age for the assemblage and described some species of lycophytes and sphenophytes, and foliage of cordaitalean and probable pteridosperms. Subsequent studies of this outcrop and its palaeontological content have been few, and a new interdisciplinary approach is needed. The succession is interpreted as fluvial-deltaic in origin, with intercalation of shallow marine deposits, which provided diagnostic plant components of the Nothorhacopteris/Botrychiopsis/Ginkgophyllum Biozone of the late Carboniferous in Argentina. Palynological assemblages recovered from the same strata contain bisaccate taeniate pollen and spores (e.g. Striatosporites heyleri) that support an age probably not older than early Moscovian.

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