Abstract
En el oeste de Rajasthan, India, la Arenisca de Jodhpur (Supergrupo de Marwar) ha librado un nuevo conjunto fósil ediacárico que comprende especímenes macroscópicos bien conservados de Aspidella, Hiemalora, grandes discos ediacáricos, Tirasiana disciformis, asteroides de Medusinites, fósiles de cuerpo blando ediacáricos similares a Anfesta y estructuras de tapices microbianas (Arumberia banksi, estructuras microbianas de tipo Kinneyia, estructuras microbianas arrugadas y otras estructuras microbianas). El registro fósil permite sugerir una amplia correlación con la Formación de Fermuse, Terranova, Australia meridional, el Mar Blanco de Rusia y Noruega, y la correlación regional con el Grupo de Bhander (Supergroup de Vindhyan) y el Grupo de Krol del Himalaya Interior.
Highlights
The Marwar Supergroup (MSG), earlier known as Trans-Aravalli Vindhyans, occupies an area of about 51,000 km2 in northwestern Rajasthan (Pareek, 1981)
In the last few years, the Jodhpur Sandstone of the Marwar Supergroup is globally known for the best repositories of Ediacaran biota (Raghav et al, 2005; Sarkar et al, 2008; Kumar & Pandey, 2009; Parihar et al, 2012; Srivastava, 2012c)
In Sursagar area, the Jodhpur Sandstone is known as Sonia Sandstone and the lithology is represented by about 16–18 m thick yellowish brown, purple and pinkish brown medium- to fine-grained sandstone, siltstone and brown shale and few conglomeratic beds having laminations, ripple-marks, cross-bedding, graded bedding and rain-prints sedimentary structures (Chauhan et al, 2001)
Summary
The Marwar Supergroup (MSG), earlier known as Trans-Aravalli Vindhyans, occupies an area of about 51,000 km2 in northwestern Rajasthan (Pareek, 1981). This study documents here the discovery of macroscopic well-preserved specimens of Aspidella, Hiemalora, large Ediacaran discs (diameter from 22 to 84 cm), Tirasiana disciformis, Medusinites asteroides, Anfesta-like Ediacaran body fossils and microbial mat structures (Arumberia banksi, Kinneyia mat structures, wrinkle mat structures and other mat structures) from the Jodhpur Sandstone of Marwar Supergroup in Sursagar and Bhopalgarh area, Jodhpur, western Rajasthan
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