Biostratigraphy and depositional environments of subsurface sediments in well Arani-A, Palar basin, Tamil Nadu

2016 ◽  
Vol 88 (4) ◽  
pp. 407-420
Author(s):  
M. H. Basavaraju ◽  
B. C. Jaiprakash ◽  
L. Chidambaram ◽  
M. Ayyadurai
Keyword(s):  
Tamil Nadu ◽  
Depositional Environments ◽  
Subsurface Sediments ◽  
Palar Basin

scholarly journals Late Cretaceous Palynostratigraphy of Subsurface Sediments of Southern Bornu Basin, Nigeria: Implications For Depositional Environments And Palaeoclimate.

2021 ◽  
Author(s):  
Ekundayo Joseph Adepehin ◽  
Bamidele Samuel Oretade ◽  
Peter Sunday Ola
Keyword(s):  
Late Cretaceous ◽  
Gamma Ray ◽  
Depositional Environments ◽  
Subtropical Climate ◽  
Standard Laboratory ◽  
Palynological Analysis ◽  
Subsurface Sediments ◽  
Sandy Shale ◽  
Assemblage Zone ◽  
Laboratory Procedures

Abstract Presented in this study are the findings of a cross-examination of the subsurface stratigraphic successions (1500-4600 m) penetrated by the Gaibu-1 well, Bornu Basin, NE Nigeria to understand the palaeoenvironmental settings and the palaeoclimatic conditions of the sediments. Sedimentological/textural description, lithological identification and palynological analysis were carried out using standard laboratory procedures and wireline (gamma-ray and SP) logs. The sediments consist predominantly of sandstone, siltstone, sandy shale, and shale. The sandstones range from fine-coarse, angular to sub-rounded, moderate to poorly sorted, and are texturally immature. Five (5) stratigraphic sub-divisions; the Bima, the Yolde, the Gongila, the Fika (Upper, Middle and Lower members) and the Gombe formations were identified. The palynozonation enabled four distinctive zones: (i) A (1) Triorites africaensis Assemblage Zone, (ii) A (2) Cretacaeiporites scabratus / Odontochitina costata Assemblage Zone, (iii) A (3) Droseridites senonicus Assemblage Zone, A (4) Syncolporites/Milfordia spp. Assemblage Zone. These suggest the well penetrated Cenomanian – Maastrichtian (younger) successions, interpreted to have been deposited in a series of continental to marginal marine environments. The sediments are characterised by palynofloral assemblages that are indicative of a tropical to subtropical climate condition that is warm and humid, which correspond to the late Cretaceous Palmae Province of Africa – Southern America.

scholarly journals Mesozoic phytoclast records in the Sriperumbudur (Palar Basin), Kota (Chintalapudi Sub-Basin) and Dubrajpur (Rajmahal Basin) formations, India

2016 ◽  
Vol 16 (4) ◽  
pp. 119
Author(s):  
Sarah Gonçalves Duarte ◽  
Neerja Jha ◽  
Eliana Schwartz Tavares ◽  
Mitsuru Arai ◽  
Maria Dolores Wanderley ◽  
...  
Keyword(s):  
Tamil Nadu ◽  
Andhra Pradesh ◽  
Palar Basin

Os estudos de cutículas de plantas fósseis em amostras de três poços perfurados na Índia localizados nos estados de Andhra Pradesh (Formação Kota/Gangapur, Sub-bacia de Chintalapudi, Graben Godavari, Jurássico–Cretáceo), Tamil Nadu (Formação Sriperumbudur, Bacia Palar, Jurássico Superior–Cretáceo Inferior) e Jharkhand (Formação Dubrajpur, Bacia de Rajmahal, Jurássico Superior e Cretáceo Inferior) são apresentados aqui. Cutículas e palinomorfos foram recuperados pelo método‑padrão de preparação palinológica no laboratório de Palinologia do Gondwana do Birbal Sahni Institute of Palaeosciences, Lucknow, Índia. Espécimes fósseis foram examinados com microscópio óptico binocular, e fotomicrografias foram obtidas com câmera digital. Vinte e sete morfotipos de cutículas fósseis (ocasionalmente representando estômatos, tricomas e estruturas secretoras) e outros tecidos (ex.: parênquima plicado) foram recuperados. A análise morfológica das cutículas e dos palinomorfos associados refletem a presença de diferentes grupos de plantas (Bennettitales, Coniferales, Ginkgoales, Polypodiales e Pteridospermales). As cutículas exibem distintas estruturas (ex.: estômatos ciclocíticos e estruturas secretoras) que permitem comparações com plantas atuais e fósseis. Conclui-se que o estudo das cutículas fósseis bem preservadas e dos palinomorfos associados permitem inferências taxonômicas na composição das floras-mãe.

scholarly journals Assessment of Groundwater Quality using GIS: A Case Study of Walayar Watershed, Parambikulam-Aliyar-Palar Basin, Tamilnadu, India

2015 ◽  
Vol 10 (2) ◽  
pp. 602-609 ◽  
Author(s):  
K Balathandayutham ◽  
C Mayilswami ◽  
D Tamilmani
Keyword(s):  
Groundwater Quality ◽  
Tamil Nadu ◽  
Geographical Information Systems ◽  
Ion Concentration ◽  
Geographical Information ◽  
Soil Productivity ◽  
Chemical Parameters ◽  
Hydrogen Ion Concentration ◽  
Rock Formations ◽  
Palar Basin

Good groundwater quality is essential for crop yield, soil productivity and environmental protection. Suitability of groundwater for irrigation purposes is determined by its geochemistry. Groundwater geochemistry explains links between chemical composition of groundwater and subsurface geological and non-geological pollutants. Subsurface rock formations control the composition of soil and hence that of water and vegetation. The ground water samples were analyzed for physico-chemical parameters like Electrical Conductivity (EC), Hydrogen ion concentration (pH), Bicarbonate (HCO3-), Calcium (Ca2+), Magnesium (Mg2+), Sodium (Na+), Potassium (K+), Sulphate (SO42-), Nitrate (NO3-), and Chloride (Cl-). Inverse distance weighted method of the Geographical Information Systems is used to prepare the distribution map of physio-chemical parameters of groundwater while overlay method is used to assess spatial, temporal changes and prepare groundwater quality zones of Walayar watershed in Parambikulam-Aliyar-Palar basin situated in Coimbatore district, Tamil Nadu, India. The results of study show that the quality of groundwater varies both spatially and temporally in Walayar watershed. The groundwater samples in some of the wells showed deviation from water quality standards indicating groundwater contamination. Hence, proper care must be taken to avoid any contamination of groundwater and its quality be monitored periodically.

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.

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