Palaeoclimatic significance of non - striate disaccate pollen in Yellandu coalfield of Godavari graben, Telangana State

2021 ◽  
Vol 25 (12) ◽  
pp. 10-18
Author(s):  
D.S. Seetharam ◽  
H. Ramakrishna
Keyword(s):  
Distribution Pattern ◽  
Frequency Distribution ◽  
Climatic Condition ◽  
Morphological Characters ◽  
Early Permian ◽  
Present Communication ◽  
Barakar Formation ◽  
Coal Block ◽  
Telangana State ◽  
Humid Climatic Condition

The present palaeopalynological study deals with the significance of non - striate disaccate pollen from bore hole Q - 563 of Yellandu coalfield (Jawahar Khani - 5 coal block), Kothagudem sub-basin and to determine the age and palaeoclimatic interpretations of the study area based on the pollen morphological characters. For the palynological investigation, sixty samples were thoroughly analyzed in which fairly diversified palynofloral assemblages of Gondwanic affinity were recorded. About 30 genera and 50 species of palynomorphs, belong to Glossopteridales, Coniferales, Cordaitales of gymnospermous pollen, pteridophytic spores. In the present communication, the palynoflora belongs to Glossopteridales viz. Scheuringipollentites barakarensis, S. maximus, S. tentulus, Ibisporites diplosaccus, Primuspollenites levis, P. densus and Sahnites thomasii etc. Frequency distribution pattern of the palynotaxa reveals that the assemblage is dominated by the non - striate disaccates followed by striate disaccates, monosaccates (gymnosperms) and pteridophytic spores. The diversified palynoassemblage of both non striate and striate disaccates pollen strongly signifies that the Yellandu coal belt of Godavari graben belongs to Barakar Formation of Early Permian age (Late Sakmarian – Early Artinskian). Predominance of non - striate disaccate pollen recorded from the Yellandu sediments indicates a warm and high humid climatic condition with fluvial environment of deposition.

scholarly journals Palaeobotanical and biomarker evidence for Early Permian (Artinskian) wildfire in the Rajmahal Basin, India

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Srikanta Murthy ◽  
Vinod Atmaram Mendhe ◽  
Dieter Uhl ◽  
Runcie Paul Mathews ◽  
Vivek Kumar Mishra ◽  
...  
Keyword(s):  
Cell Walls ◽  
Bimodal Distribution ◽  
Polyaromatic Hydrocarbon ◽  
Early Permian ◽  
Anatomical Features ◽  
Coal Deposits ◽  
Barakar Formation ◽  
Coal Block ◽  
Excellent Preservation ◽  
Electronic Microscope

AbstractThis study provides a combined analysis on the palynology, fossil charcoal and biomarkers of the subsurface coal deposits from a borehole RMB #2 drilled at the Dhulia Coal Block, Rajmahal Basin, India, in attempts to establish the chronology of sedimentation and to propose palaeobotanical as well as geochemical evidence for the occurrence of wildfires in these sediments. The palynological investigation suggests a Scheuringipollenites barakarensis palynoassemblage from the lower Barakar Formation, dated as Artinskian (Early Permian) in age. This assemblage reveals the dominance of Glossopteridales and sub-dominance of taxa belonging to Cordaitales and Coniferales. Fossil charcoal in sediments is usually recognized as a direct indicator for the occurrence of palaeo-wildfires. More data involving the anatomical features of fossil charcoal analyzed by Field Emission Scanning Electronic Microscope broaden our knowledge on Early Permian wildfires from the peninsula of India. The studied macroscopic charcoal fragments exhibit anatomical details such as homogenized cell walls, uniseriate simple and biseriate alternate pitting on tracheid walls and rays of varying heights pointing to a gymnospermous wood affinitity. The excellent preservation of charcoal fragments, shown by their large sizes and almost unabraded edges, suggests a parautochthonous origin. The embedded biomarker study performed for charcoal sediments and its characterization demonstrate the presence of n-alkanes, isoprenoids, terpenoids and aromatic compounds. A bimodal distribution pattern of n-alkanes with a Cmax at n-C25 is identified. Diterpenoids and pentacyclic terpenoids are identified, indicating the input of an early conifer vegetation and bacterial activity, respectively. The identified polyaromatic hydrocarbon (PAH) compounds, together with the charcoal fragments, clearly suggest that repeated wildfire events occurred during the deposition of these Artinskian sediments in the Rajmahal Basin.

scholarly journals Chondritesisp. Indicating Late Paleozoic Atmospheric Anoxia in Eastern Peninsular India

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Biplab Bhattacharya ◽  
Sudipto Banerjee
Keyword(s):  
Carbon Dioxide ◽  
Trace Fossil ◽  
Late Paleozoic ◽  
Early Permian ◽  
Oxygen Level ◽  
Eastern India ◽  
Peninsular India ◽  
Barakar Formation

Rhythmic sandstone-mudstone-coal succession of the Barakar Formation (early Permian) manifests a transition from lower braided-fluvial to upper tide-wave influenced, estuarine setting. Monospecific assemblage of marine trace fossilChondritesisp. in contemporaneous claystone beds in the upper Barakar succession from two Gondwana basins (namely, the Raniganj Basin and the Talchir Basin) in eastern peninsular India signifies predominant marine incursion during end early Permian. MonospecificChondritesichnoassemblage in different sedimentary horizons in geographically wide apart (~400 km) areas demarcates multiple short-spanned phases of anoxia in eastern India. Such anoxia is interpreted as intermittent falls in oxygen level in an overall decreasing atmospheric oxygenation within the late Paleozoic global oxygen-carbon dioxide fluctuations.

Reproductive performance of Beltsville small White and Broad Breasted Bronze Turkeys (Meleagris gallopavo) under hot humid climatic condition

2015 ◽  
Vol 49 (6) ◽  
Author(s):  
M. Anna Anandh ◽  
P. N. Richard Jagatheesan
Keyword(s):  
Reproductive Performance ◽  
Climatic Condition ◽  
Management Practices ◽  
Meleagris Gallopavo ◽  
Embryonic Mortality ◽  
Humid Climate ◽  
Egg Hatchability ◽  
Standard Management ◽  
Hot Humid Climate ◽  
Humid Climatic Condition

The study was conducted to compare the reproductive performance of Beltsville Small White and Broad Breasted Bronze turkeys (<italic>Meleagris gallopavo</italic>) under the hot humid climatic condition. Beltsville Small White and Broad Breasted Bronze turkeys were raised in an intensive production system under standard management practices. A total of 560 Beltsville Small White turkey eggs and 520 Broad Breasted Bronze turkey eggs were used for this study. Average egg weight (g), infertile eggs (%), early embryonic mortality (%), late embryonic mortality (%), dead in shell (%) and poults hatched weight (g) were significantly (P>0.01) higher in Broad Breasted Bronze turkeys as compared to Beltsville Small White turkeys. The total hatchability (%), fertile egg hatchability (%) and poults survivability (%) were (P>0.01) significantly higher in Beltsville Small White turkeys as compared to Broad Breasted Bronze turkeys. Non significantly higher fertility percentage was observed in Beltsville Small White turkeys as compared to Broad Breasted Bronze turkeys. It is concluded that Beltsville Small White turkeys are more suitable to obtain better reproductive performance under hot humid climate condition followed by Broad Breasted Bronze turkeys.

scholarly journals Delimitación de Neobuxbaumia mezcalaensis y N. multiareolata (Cactaceae) con base en análisis multivariados

2019 ◽  
Vol 86 ◽  
pp. 53 ◽  
Author(s):  
Gabriel Arroyo Cosultchi ◽  
Teresa Terrazas ◽  
Salvador Arias ◽  
Lauro López Mata
Keyword(s):  
Distribution Pattern ◽  
Multivariate Analyses ◽  
Single Species ◽  
Morphological Characters ◽  
Spine Length ◽  
Working Hypothesis ◽  
Intermediate Phenotypes ◽  
Respective Species ◽  
Independent Species

<em>Neobuxbaumia multiareolata</em> and <em>N. mezcalaensis</em> are taxa poorly defined, despite the second species was described originally as a variety of first. Although several classification proposals indicate that they represent different species, in the most recent cacti classification, both are considered a single species. The working hypothesis is that there are morphological characters that allow to separating <em>N. mezcalaensis</em> and <em>N. multiareolata</em>. Multivariate analyses were performed, with a total of 15 populations, to test if a boundary between <em>N. mezcalaensis</em> and <em>N. multiareolata</em> exists, and to compare the morphological characters with those of <em>N. squamulosa</em> and <em>N. polylopha</em>. The results allowed recognizing that intermediate phenotypes do not exist and that individuals of each analyzed populations were classified in their respective species. The areole size and form, central spine length and distribution pattern of the radial spines, plus four characters mentioned previously by other authors, allowed to differentiate <em>N. mezcalaensis</em> from <em>N. multiareolata</em>. Based on these evidences we propose that they represent independent species.

scholarly journals A Study of Anatomical Shape of arch projected by Alveolar Process of Maxillary and Mandibular Bone

2020 ◽  
Vol 13 (2) ◽  
pp. 164-168
Author(s):  
Prakash Baral ◽  
Rami Shrestha ◽  
Subash Sapkota ◽  
Sapana Koju ◽  
Binod Chaudhari
Keyword(s):  
Distribution Pattern ◽  
Frequency Distribution ◽  
Alveolar Process ◽  
Mandibular Bone ◽  
Male And Female ◽  
Arch Form ◽  
Significant Difference ◽  
Maxilla And Mandible ◽  
Brass Wire ◽  
Alveolar Arch

Introduction: Maxilla and Mandible have an alveolar process that bears socket for root of teeth. When the teeth fall or gets extracted there is resorption of alveolar process. The teeth alignment determines the shape of alveolar process. The objectives of the study was to assess the distribution pattern of anatomical shape of arch projected by alveolar process in Maxilla and Mandible and to compare the anatomy of arch amongst the population of Aryan and Mongoloid communities. Methodology: A total number of 856 people with intact anatomy of alveolar arch were included in the study. Anatomy of alveolar arches were assessed and noted for all. The brass wire was contoured according the shape of alveolar arch of patients and the shape was observed and noted down. Result: The study result showed there was significant difference in frequency distribution of ‘U’, ’V’ and ‘Ovoid’ shape alveolar arch form in maxilla and mandible. There was significant difference in distribution of ‘U’ and ‘V’ shape alveolar arch form in maxilla and ‘U’, ‘V’ and ‘Ovoid’ shape arch form in mandible between mongoloid and Aryan communities. Conclusion: ‘U’shape alveolar arch was seen more frequently in mandible where as “V” shape and ‘Ovoid’ shape arch in maxilla. ‘U’ shape alveolar arch was more frequently seen in Mongoloid communities and ‘V’ shape was more frequently seen in Aryan communities. There was no significant difference in comparison of frequency percentage of various types of arch form between the Male and Female.  

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