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Nimbia: The Discoid Organisms from Ediacaran Sonia Sandstone of Jodhpur Group, Marwar Supergroup, Western India


Affiliations
1 Department of Geology, Jai Narain Vyas University, Jodhpur 342 005, India
 

In this study, we report well-preserved fossil remains of Nimbia from the Ediacaran Sonia Sandstone of Jodhpur Group, Marwar Supergroup in the Sursagar area of Jodhpur district, Rajasthan, western India. Here, two species of Nimbia, namely Nimbia occlusa and Nimbia dniesteri, have been recorded on medium- to fine-grained sandstone bedding surfaces. The N. occlusa forms are circular to ovate and elliptical imprints with a smooth and flat central part and enclosed by a single thick, annular marginal rim, whereas the N. dniesteri remains are circular to sub-circular discoid impressions with a trapezoidal structure. Here, the recorded N. occlusa is common compared to the N. dniesteri fossil forms in the Ediacaran Sonia Sandstone. These Nimbia fossil forms are found in the Sonia Sandstone in terrestrial to marginal marine habitats with moderate hydrodynamic forces.

Keywords

Discoid Organisms, Fossil Remains, Hydrodynamic Forces, Nimbia Species.
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  • Nimbia: The Discoid Organisms from Ediacaran Sonia Sandstone of Jodhpur Group, Marwar Supergroup, Western India

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Authors

Hukmaram
Department of Geology, Jai Narain Vyas University, Jodhpur 342 005, India
Anshul Harsh
Department of Geology, Jai Narain Vyas University, Jodhpur 342 005, India
Pawan Kumar
Department of Geology, Jai Narain Vyas University, Jodhpur 342 005, India
V. S. Parihar
Department of Geology, Jai Narain Vyas University, Jodhpur 342 005, India

Abstract


In this study, we report well-preserved fossil remains of Nimbia from the Ediacaran Sonia Sandstone of Jodhpur Group, Marwar Supergroup in the Sursagar area of Jodhpur district, Rajasthan, western India. Here, two species of Nimbia, namely Nimbia occlusa and Nimbia dniesteri, have been recorded on medium- to fine-grained sandstone bedding surfaces. The N. occlusa forms are circular to ovate and elliptical imprints with a smooth and flat central part and enclosed by a single thick, annular marginal rim, whereas the N. dniesteri remains are circular to sub-circular discoid impressions with a trapezoidal structure. Here, the recorded N. occlusa is common compared to the N. dniesteri fossil forms in the Ediacaran Sonia Sandstone. These Nimbia fossil forms are found in the Sonia Sandstone in terrestrial to marginal marine habitats with moderate hydrodynamic forces.

Keywords


Discoid Organisms, Fossil Remains, Hydrodynamic Forces, Nimbia Species.

References





DOI: https://doi.org/10.18520/cs%2Fv125%2Fi9%2F999-1004