Microstructure Analysis Of Miocene Shark Teeth Of Baripada Beds, Odisha, India
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Date
2018, 2018
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Publisher
Central University of Punjab
Abstract
The present study focuses on the microstructures of Miocene shark teeth of different
taxa. For this, samples have been collected from Baripada area, along the river
Burhabalang, in the state of Odisha, a place which has undergone global marine
transgression in the late Miocene age and yields a good and diverse assemblage of
fossils. For the process of analysis, the samples have been polished with corundum
powder mixed with one or two drops of water and etched with 2N HCl and acetone.
Analysis has been done using Scanning Electron Microscope (SEM) and the results
showed that the Chondrichthyan group of sharks has a single homogenous layer known
as the Single Crystallite Enameloid (SCE), whereas the Neoselachian group of sharks
are more advanced, complex and undergone evolution, comprising of a triple-layered
enameloid, namely the Shiny Layer Enameloid (SLE), the Parallel Bundled Enameloid
(PBE) and the Tangled Bundled Enameloid (TBE). The study is done to examine
different microstructural forms and conduct comparative analysis. In this study, majority
of the samples have shown to belong to the Neoselachian group, whilst the
remaining few were shown to have Chondricthyan origin. The enameloid in the shark
teeth is much harder than the dentin due to the presence of high mineral content and
shows a more complex organisation of crystallites at the apical portion of the teeth.
Description
Keywords
Microstructures, Transgression, Corundum powder, Chondrichthyan, Neoselachian, SEM, SCE, SLE, PBE, TBE
Citation
Gogoi, Bikash Jyoti (2018) Microstructure Analysis Of Miocene Shark Teeth Of Baripada Beds, Odisha, India.