Structures and sequences in early Permian fluvial Barakar rocks of peninsular India Gondwana basins using binomial and Markov chain analysis

Tewari, Ram Chandra; Khan, Zahid Ali

doi:10.1007/s12517-016-2799-6

Cited by 6 publications

(4 citation statements)

References 33 publications

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“…The Pranhita-Godavari Basin is a narrow rectilinear basin trending NNW-SSE (Fig. 1C) and runs parallel to the basement fabric in close conformity with the underlying Proterozoic rocks (Tewari & Maejima, 2010). The basin is slightly asymmetrical where the thickest sedimentary pile (about 4 km) is found closer to the western margin (Chakraborty et al, 2003).…”

Section: Geological Settingmentioning

confidence: 85%

A new typothoracine aetosaur (Archosauria, Pseudosuchia) from the Upper Triassic of India with insights on biostratigraphy, diversification, and paleobiogeography

Haldar,

Ray,

Bandyopadhyay

2023

Journal of Vertebrate Paleontology

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A new typothoracine aetosaur is described based on multiple isolated and articulated left paramedian and lateral osteoderms recovered from the Upper Triassic lower Dharmaram Formation of India. The partial carapace of the new taxon is reconstructed as strongly discoidal based on the curvature of the paramedian osteoderms with the widest one positioned dorsal to the mid-dorsal trunk vertebra. Asymmetric lateral osteoderms with acute flexion are considered as precaudals with the angle of flexion decreasing posteriorly. Phylogenetic analysis recovered the new taxon as deeply nested within the clades Typothoracinae and Paratypothoracini, and a sister taxon to Kocurypelta silvestris. The autapomorphic characters involving paramedian osteoderms dorsal to the trunk vertebrae include dorsal surface ornamented by large, irregular pits surrounding the dorsal eminence and radiating ridges in other areas, straight anterior margin of the anteromedial corner of the anterior bar in dorsal view, and raised or ridged and ornamented posteromedial corner. The current study highlights the significance of the new aetosaur, and the age of the lower Dharamaram Formation is modified here as mid-Norian to Rhaetian based on global correlation with other coeval horizons. The recovery of this taxon marks the first record of Paratypothoracini from high paleolatitudes of the Gondwanan region. The study corroborates the earlier findings of a strong Laurasian faunal influx in India during the Late Triassic suggesting possible land bridges and/or conducive environmental conditions for faunal dispersal.

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Section: Geological Settingmentioning

confidence: 85%

A new typothoracine aetosaur (Archosauria, Pseudosuchia) from the Upper Triassic of India with insights on biostratigraphy, diversification, and paleobiogeography

Haldar,

Ray,

Bandyopadhyay

2023

Journal of Vertebrate Paleontology

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“…It would imply that the two sections, although widely spaced, provide evidence of similar depositional environment during the Barakar sedimentation. The depositional sedimentary units, such as channel-fill and over-bank deposits, show considerable lateral variation in both transverse and parallel directions to the channel belt owing to the variability in hydraulic conditions (Singh and Khan 2000;Bogg 2005;Miall 2013;Tewari and Khan 2017). On the other hand, an increase in the descriptive details of sedimentary succession in the criteria of litho-stratigraphic correlation does not improve its stratigraphic correlation and actually have an opposite effect due to differential subsidence of lithofacies in space and time.…”

Section: Discussionmentioning

confidence: 99%

Lithofacies correlation in Early Permian fluvial Gondwana stratigraphy of southeastern India using cross-association statistics

Khan¹,

Tewari²

2018

J Earth Syst Sci

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The cross-association statistical technique is used to correlate major and minor lithofacies and the corresponding facies areas in the widely separated two borehole log profiles of Early Permian succession from the Kaghaznagar and Kothagudem sub-basins of Pranhita-Godavari Graben (PGG) of southeastern India. The one-to-one correspondence of the cross-association of major lithofacies and facies areas is strikingly similar and matches significantly more than expected. It indicates the continuity of single homogenous succession deposited under an identical depositional environment in the widely separated two sub-basins of PGG. However, the dissimilarity between the micro-lithofacies, on the other hand, suggests a different sub-environment through space and time. The significant correlation of major lithofacies and facies areas of the two sub-basins suggests meandering stream depositional facies model of the Early Permian Barakar succession in PGG. It may also provide information regarding the exploration of coal. The dissimilarities of cross-association at the micro-lithofacies level may reflect the differential subsidence through space and time.

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“…In the last decade, similar Markov Chain approach has been successfully applied in facies analysis of various types of deposits by Stanova et al (2009), Hota and Das (2010), Sumner et al (2012), Colombera et al (2013), Marino andAmaya (2016), Milo (2017), Tewari and Khan (2017), Li et al (2018), Pérez-Pueyo et al (2018, Lapcik (2019), andSubagja et al (2019). As well, this type of approach has been widely used in a wide range of sedimentary deposits, spanning from nonmarine to marine deposits, and in both turbidite and nonturbidite systems.…”

Section: Methodsmentioning

confidence: 99%

A Combination of Embedded Markov Chain and Binomial Probability As A Tool in Sedimentary Facies Analysis

Setiadi¹,

Haryanto²,

Muljana³

et al. 2022

Indonesian J. Geosci.

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The methodology of facies analysis may include statistical examination to establish a local facies model. Without such examination, it is very difficult to predict the facies succession and to interpret the changes in depositional conditions from thick or complex stratigraphic sections. Based on the survey of sedimentary geologic literature in Indonesia, it is suggested that the aforementioned statistical method has relatively seldom been used in Indonesia. Such a situation may reflect a gap in information on the methodology and, accordingly, it seems imperative that there should be a re-exposition of the method. This paper presents a concise exposition of the combination of the embedded Markov Chain and binomial probability as one of the most successful statistical methods which are used in facies analysis. The results of previous studies of The Citalang Formation are used as a case study to illustrate its applications to the real geologic world.

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Structures and sequences in early Permian fluvial Barakar rocks of peninsular India Gondwana basins using binomial and Markov chain analysis

Cited by 6 publications

References 33 publications

A new typothoracine aetosaur (Archosauria, Pseudosuchia) from the Upper Triassic of India with insights on biostratigraphy, diversification, and paleobiogeography

A new typothoracine aetosaur (Archosauria, Pseudosuchia) from the Upper Triassic of India with insights on biostratigraphy, diversification, and paleobiogeography

Lithofacies correlation in Early Permian fluvial Gondwana stratigraphy of southeastern India using cross-association statistics

A Combination of Embedded Markov Chain and Binomial Probability As A Tool in Sedimentary Facies Analysis

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