Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

G. Dasgupta ¹, Sheo Prasad ¹

Affiliations
1 175, Desh Bandhu Apartments, Kalkaji, New Delhi-100 019, IN

Abstract

Bioturbation signatures in the form of trails and traces have been recorded from the Proterozoic Delhi Supergroup of rocks exposed in Southern Haryana. These structures bear strong resemblance to the similar traces and trails reported from correlatable Alwar and Ajabgarh Group of rocks of Rajasthan. In this note the authors report and discuss the possibilities of such structures being biogeneic or abiogenic.

Keywords

Fossil trails, Delhi Supergroup, Haryana.

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Sheo Prasad ¹, Joyesh Bagchi ¹

Affiliations
1 Geological Survey of India, Faridabad - 121 001, IN

Abstract

Aeolian deposits occur extensively over the Ambala Older Alluvium in the southern and western part of Haryana. Delineating aeolian sediment transport pattern assists in characterising the aeolian environment and in understanding the evolution of the Thar Desert. Surface exposures of the Late Quaternary stabilised dunes do not exhibit primary structures based on which sediment transport direction can be inferred. The present study of a part of Haryana aims at trend analysis of the first three moment measures of aeolian sediment size distribution to delineate sediment transport pattern.

In the study area trend surface analysis of mean sorting and skewness shows statistically significant trends. Mean size and skewness with a linear trend decreases towards northeast. Sorting increases towards northeast, southeast and southwest. Transport vector' analysis reveals a sediment transport pattern, With northeast and south as the two dominant directions of transportation.

Keywords

Aeolian Sediment, Net Sediment Transport, Size Statistics, Transport Vector, Haryana.

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