Palynological and organic geochemical studies of the middle Eocene Siju Formation of Garo Hills, Meghalaya, India

Singh, Y. Raghumani; Rudra, Arka; Singh, Sh Priyokumar; Dutta, Suryendu; Devi, M Sapana; Devi, N Reshma

doi:10.1007/s12040-021-01760-6

Cited by 4 publications

(3 citation statements)

References 33 publications

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“…The dinocysts consists of Glaphyrocysta intricate, Operculodinium centrocarpum, Impagidinium sp., Spiniferites pseudofurcatus. Among these dinocysts Glaphyrocysta intricate and Operculodinium centrocarpum are closely comparable with Middle Eocene palynological assemblage recorded in the Middle Eocene sediment throughout the globe (Sexana and Sarkar 2000; Singh et al 2022).…”

Section: Discussionsupporting

confidence: 78%

Petrography and stable isotope geochemistry of Middle Eocene Garampani limestone (Assam), India: implications for the depositional environment and diagenesis

Singh

Devi

Abbott

et al. 2023

Carbonates Evaporites

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Petrography and stable isotopic (carbon and oxygen) studies of the Middle Eocene of Garampani limestone from Jamunagar limestone quarry of the Umrangso area, North Cachar Assam, were carried out to determine the environment of deposition and the level of diagenesis to improve our understanding of the climate at the time of formation. The major petrographic types documented here are include wackestone, packstone and grainstone which fall into the type I and II categories of the triangular classi cation scheme indicating formation in a shortlived, high-energy environment that was dissipating at the time of deposition. The samples have a distinct signature that includes extensive diagenesis with varying intensities of compaction, recrystallization, pressure solution, and neomorphism. Most of the samples produced positive δ 13 C ‰ ranges from 1.64 to 0.76‰ (PDB) and correlated with a transgressive phase. The negativeδ 18 Ovalues range from − 6.25 to -4.67‰ (PDB) suggesting that the Middle Eocene was generally characterized by a warmer climate.

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Section: Discussionsupporting

confidence: 78%

Petrography and stable isotope geochemistry of Middle Eocene Garampani limestone (Assam), India: implications for the depositional environment and diagenesis

Singh

Devi

Abbott

et al. 2023

Carbonates Evaporites

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“…The taxa Corbula ( Bicorbula ) praexarata is not considered in this FAD and LAD analysis due to the long range from Late Palaeocene to Eocene in the restricted Eocene taxa. The Siju Formation has been supported the above age based on Echioidea (Srivastava & Garg, 2014), foraminiferal assemblage (Sarkar et al, 2014) and dinoflagellate cysts (Sarkar et al, 2014; Saxena & Sarkar, 2000; Singh et al, 2022). This zone has been assigned to the Middle Eocene.…”

Section: Biostratigraphymentioning

confidence: 85%

“…The rich assemblage of calcareous algae and foraminiferal assemblages has been reported and assigned shallow marine with inner ramp depositional condition from the Prang Limestone (Kishore et al, 2007;Misra et al, 2011). Dinoflagellate cysts, spores and pollen grains have been documented on the Siju Formation of Garo Hills (Sarkar et al, 2014;Saxena & Sarkar, 2000;Singh et al, 2021Singh et al, , 2022. A lower Bartonian brissid echinoid, Eupatagus, is recorded from the Siju Formation exposed at about 7 km southeast of Adugiri village (along Dilni River), Garo Hills (Srivastava & Garg, 2014).…”

Section: Introductionmentioning

confidence: 99%

Middle Eocene molluscan fossils from the Siju Formation of the Garo Hills, Meghalaya, India

Singh,

Devi

et al. 2024

Journal of the Palaeontological Society of India

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Bivalves and Gastropoda are collected from the Siju Formation of South Garo Hills, Meghalaya, India. Eighteen molluscan taxa are recorded, that is, nine taxa of bivalves and nine taxa of gastropods. These are comprising Ostrea ( Ostrea) adbasaensis, Lucina rakhiensis, Lucina ( Lucina) yawensis, Trachycardium minbuense, Mactra ( Mactra) protoreevesii, Pitar ( Calpitaria) carteri, Paphia ( Callistotapes) pseudoliratus, Tellina ( Peronaea) planta, Corbula ( Bicorbula) praexarata, Natica coxi, Seila stracheyi, Euspira soriensis, Semicassis mekranica, Oliva ( Strephona) australis var. indica, Conus ( Lithoconus) kyudawonensis. Dolium ( Eudolium) arabicum, Gistortia ( Vicetia) depressa and Planorbis sp. The detailed systematic description of the present molluscan fossils is studied. One zone is established, that is, Lucina yawensis– E. soriensis zone, for correlation purpose and dating. Overall, the zone is based on the total range of molluscan species and name accordingly. The present zone has been assigned to Middle Eocene in age.

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Source and depositional conditions of early Palaeogene coal-bearing sediments, Meghalaya, Eastern India

Singh,

Rudra,

Singh

et al. 2023

J Earth Syst Sci

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Palynological and organic geochemical studies of the middle Eocene Siju Formation of Garo Hills, Meghalaya, India

Cited by 4 publications

References 33 publications

Petrography and stable isotope geochemistry of Middle Eocene Garampani limestone (Assam), India: implications for the depositional environment and diagenesis

Petrography and stable isotope geochemistry of Middle Eocene Garampani limestone (Assam), India: implications for the depositional environment and diagenesis

Middle Eocene molluscan fossils from the Siju Formation of the Garo Hills, Meghalaya, India

Source and depositional conditions of early Palaeogene coal-bearing sediments, Meghalaya, Eastern India

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