Selected Tertiary Angiosperm Pollens from India and Their Relationship with African Tertiary Pollens

Jansonius, Jan; Thanikaimoni, G.; Caratini, Claude

doi:10.2307/1222252

Cited by 10 publications

(2 citation statements)

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“…The stratigraphic ranges of key dinoflagellate cysts have been determined by Last Appearance Datum and First Appearance Datum and followed the works of Mehrotra et al (2002), Mehrotra et al (2005), Mehrotra and Kapoor (2022), Wilson and Clowes (1980), Williams and Bujak (1985) and Williams et al (1993). The works of Helby et al (1987), Jansonius and Hills (1976), Nautiyal et al (2000), Prasad et al (1985), Singh and Venkatachala (1987), Thanikaimoni et al (1984), Tiwari and Tripathi (1987) have been used for identification of spores and pollen. Consulted the works of Mehrotra et al (2002), Mehrotra et al (2005) and Mehrotra et al (2022) for interpreting Palynology in Hydrocarbon Exploration of the Indian scenario.…”

Section: Materials and Methodologymentioning

confidence: 99%

Palynostratigraphy and depositional environment of Tura and Pre-Tura sedimentary successions in Dhansiri Valley of Upper Assam Shelf, Assam & Assam-Arakan Basin, Assam, India

Narsimha,

Phor,

Ghosh

et al. 2023

Journal of the Palaeontological Society of India

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Detailed palynological investigations have been carried out to reconstruct stratigraphy and interpretation of depositional environment of Tura and Pre-Tura sedimentary sections in Dhansiri Valley of Upper Assam Shelf, Assam & Assam-Arakan Basin. Sediments of the Tura Formation dated as Early Eocene and interpreted to be deposited under subtidal to inner shelf environment. Pre-Tura sediments, developed in studied wells, led to the identification of Dergaon, Bamangaon and Moabund formations with intervening unconformities, having different tectonic history and distinct palynofossil assemblages. Early Permian sediments of the Dergaon Formation (=Talchir Formation), the oldest in the basin are deposited under the intracratonic phase, overlie the metamorphic basement complex. The sediments of the Dergaon Formation are unconformably overlain by the Bamangaon Formation deposited during the Early Cretaceous, whereas, in well DR-A, the sediments of the Dergaon Formation are directly overlain by the Moabund Formation corresponding to the Late Maastrichtian age. The sediments of the Tura Formation overlie the Maobund Formation in well DR-A, and they overlie the Bamangaon Formation in the rest of the wells in Dhansiri Valley.

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Section: Materials and Methodologymentioning

confidence: 99%

Palynostratigraphy and depositional environment of Tura and Pre-Tura sedimentary successions in Dhansiri Valley of Upper Assam Shelf, Assam & Assam-Arakan Basin, Assam, India

Narsimha,

Phor,

Ghosh

et al. 2023

Journal of the Palaeontological Society of India

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show abstract

“…The stratigraphic ranges of key dinoflagellate cysts have been determined by LAD (Last Appearance Datum) and FAD (First Appearance Datum) and followed the works of Wilson and Clowes (1980), Williams and Bujak (1985), Williams et al (1993), Prasad et al (1985) and Helby et al (1987). The works of Jansonius and Hills (1976), Singh (1971) and Thanikaimoni et al (1984) are used for identification of spore-pollen. Works of Mehrotra et al (2002), Mehrotra et al (2005) and Mehrotra and Kapoor (2022) are refered for for interpreting Palynology in Hydrocarbon Exploration of the Indian scenario.…”

Section: Methodsmentioning

confidence: 99%

Record of Early Cretaceous dinoflagellate cysts from well JM-A, Dhansiri Valley of Upper Assam Shelf, India

Geddada,

Narsimha

2023

Journal of the Palaeontological Society of India

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A palynological study on subsurface Early Cretaceous sediments (1550–1860 m) in well JM-A located in Dhansiri Valley, Upper Assam Shelf has been carried out for determination of age and depositional environment. The palynological investigations resulted into the identification of the characteristic and diversified occurrence of Early Cretaceous dinoflagellate cysts comprising Batioladinium micropodum, Achomosphaera? neptuni, Batiacasphaera asperata, Lagenorhytis sp. cf. L. delicatula, Mendicodinium caperatum and Canningia sp. along with associated dinoflagellate cysts. The significant assemblage of spore-pollen assemblage represented by Cicatricosisporites australiensis, Ceratosporites equalis, Gleicheniidites circinidites, Contignisporites cooksonii, Microcachryidites antarcticus, Podosporites tripakshii and Callialasporites trilobatus has also been recorded. The Early Cretaceous sediments are regarded as Bamangaon Formation in Dhansiri Valley. The occurrence of dinoflagellate cysts suggests marginal marine environment for Bamangaon Formation deposited during the Early Cretaceous period corresponding to the Rift Phase. The Formation overlies the Metamorphic Basement Complex, and it is unconformably overlain by the sediments of Tura Formation of Ypresian (Early Eocene) age, deposited under subtidal to inner shelf environment during the Passive Margin Tectonic Phase.

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Fossil pollen of Alangium from the eocene lignite of gujarat, India, with comments on its stratigraphic antiquity

Phadtare

Thakur

1990

Review of Palaeobotany and Palynology

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Selected Tertiary Angiosperm Pollens from India and Their Relationship with African Tertiary Pollens

Cited by 10 publications

References 0 publications

Palynostratigraphy and depositional environment of Tura and Pre-Tura sedimentary successions in Dhansiri Valley of Upper Assam Shelf, Assam & Assam-Arakan Basin, Assam, India

Palynostratigraphy and depositional environment of Tura and Pre-Tura sedimentary successions in Dhansiri Valley of Upper Assam Shelf, Assam & Assam-Arakan Basin, Assam, India

Record of Early Cretaceous dinoflagellate cysts from well JM-A, Dhansiri Valley of Upper Assam Shelf, India

Fossil pollen of Alangium from the eocene lignite of gujarat, India, with comments on its stratigraphic antiquity

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