Early Eocene macroflora and associated palynofossils from the Cambay Shale Formation, western India: Phytogeographic and palaeoclimatic implications

Palaeoworld ◽  
2015 ◽  
Vol 24 (3) ◽  
pp. 293-323 ◽  
Author(s):  
Hukam Singh ◽  
Mahesh Prasad ◽  
Kishor Kumar ◽  
Sanjai K. Singh
Keyword(s):  
Western India ◽  
Early Eocene ◽  
Shale Formation ◽  
Cambay Shale Formation ◽  
Cambay Shale

New hypsodont tillodont (Mammalia, Tillodontia) from the early Eocene of India

2013 ◽  
Vol 87 (5) ◽  
pp. 842-853 ◽  
Author(s):  
Kenneth D. Rose ◽  
Kishor Kumar ◽  
Rajendra S. Rana ◽  
Ashok Sahni ◽  
Thierry Smith
Keyword(s):  
North American ◽  
Early Eocene ◽  
Local Fauna ◽  
Lignite Mine ◽  
Shale Formation ◽  
Cambay Shale Formation ◽  
Cambay Shale ◽  
Vastan Lignite Mine

A new tillodont,Anthraconyx hypsomylus, n. gen. n. sp., is described from the early Eocene Cambay Shale Formation at Vastan Lignite Mine, Gujarat, India.Anthraconyx hypsomylusis the smallest Eocene tillodont and is distinguished by having the most buccally hypsodont cheek teeth of any known esthonychine. The closest dental resemblances are to North AmericanEsthonyxandAzygonyxand EuropeanPlesiesthonyx, providing further evidence of affinities between the Vastan local fauna and Euroamerican vertebrate faunas.

Minute and diverse in fossil sticky stuff: Tanytarsini (Diptera: Chironomidae) from early Eocene Indian Cambay amber

2020 ◽  
Vol 189 (4) ◽  
pp. 1398-1425
Author(s):  
Marta Zakrzewska ◽  
Hukam Singh ◽  
Ewa Wagner-Wysiecka ◽  
Wojciech Giłka
Keyword(s):  
Systematic Review ◽  
Physical Properties ◽  
Spectral Characteristics ◽  
Early Eocene ◽  
Shale Formation ◽  
Cambay Shale Formation ◽  
Cambay Shale ◽  
Eocene Amber

Abstract We here present a pioneering systematic review of fossil dipterans of the tribe Tanytarsini (family Chironomidae) discovered in Indian amber from Cambay. The specimens examined belong to five species: Gujaratomyia miripes,Stempellina stebneri sp. nov., Stempellinella pollex sp. nov., Tanytarsus forfex sp. nov. andTanytarsus ramus sp. nov., which are described. All species belong to the oldest known Tanytarsini and come from the Cambay shale formation in Tadkeshwar, dated to the early Eocene (~54 Mya). Displaying unusual characters/structures of diagnostic and phylogenetic importance, the specimens studied are discussed against the background of the evolution and systematics of the oldest fossil (Eocene) and extant representatives in the tribe. An updated checklist and key to the identification of genera and species of Tanytarsini from Eocene amber is also provided. The spectral characteristics and physical properties of Cambay amber are similar to those of glessite resins, which are discussed in detail in order to substantiate the identity of the amber and the origin of the inclusions studied.

Late Paleocene-Early Eocene Foraminiferal Assemblage and Carbon Isotope Excursion Indicating Hyperthermal Events in Paleotropical Succession of Northwestern India

2021 ◽  
Vol 51 (1) ◽  
pp. 4-13
Author(s):  
Sonal Khanolkar ◽  
Tathagata Roy Choudhury ◽  
Pratul Kumar Saraswati ◽  
Santanu Banerjee
Keyword(s):  
Carbon Isotope ◽  
Detrended Correspondence Analysis ◽  
Western India ◽  
Early Eocene ◽  
Foraminiferal Assemblage ◽  
Trophic Conditions ◽  
Jaisalmer Basin ◽  
Early Eocene Climatic Optimum ◽  
Late Paleocene ◽  
Carbon Isotope Excursion

ABSTRACT This study focuses on marine sediments of the late Paleocene-early Eocene (∼55.5–49 Ma) interval from the Jaisalmer Basin of western India. It demarcates the Paleocene Eocene Thermal Maximum (PETM) using foraminiferal biostratigraphy and carbon isotope stratigraphy. A negative carbon isotope excursion of 4.5‰ delineates the PETM within the basin. We demarcate five foraminiferal biofacies using the detrended correspondence analysis. These reflect characteristics of ecology, bathymetry, relative age, and environment of deposition of the foraminifera. They record the response of foraminifera to the warmth of the PETM. Biofacies A was deposited within an inner neritic setting ∼55.5 Ma and includes benthic foraminifera Haplophragmoides spp., Ammobaculites spp., and Lenticulina spp. The presence of Pulsiphonina prima and Valvulineria scorbiculata in Biofacies B suggests an increase in runoff conditions in the basin. Fluctuating trophic conditions prevailed between ∼54–50 Ma. It is evidenced by alternating Biofacies C (endobenthic and chiloguembelinids of eutrophic conditions) and Biofacies D (epibenthic and acarininids of oligotrophic conditions). Biofacies E is dominated by deep-dwelling parasubbotinids, indicating an increase in bathymetry, possibly corresponding to the Early Eocene Climatic Optimum (∼49 Ma).

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