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

Manoj Shukla ¹, Prabhat Kumar ², Anand Prakash ¹, G. P. Srivastava ¹, Madhav Kumar ¹

Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow - 226 007, IN
2 Zoology Department, University of Lucknow, Lucknow - 226 007, IN

Abstract

A resin-embedded male Culex mosquito, beetle larvae and dwelling spaces viz., galleries and chambers of Ambrosia beetle were recovered from the shallow shoreline Tertiary sediments of Warkalli Formation exposed along Kerala coast. Lumps and rods of resin are found associated with the impure lignitic clay beds of the sequence. It indicates that the vegetation growing during that time was dominated by resin producing plants and the conditions were favourable for the insects to get entrapped in the gum. Such organic remains are useful in the study of fossil DNA

Keywords

Palaeontology, Warkalli Formation, Resin, Fossil Mosquito, Kerala.

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Madhav Kumar ¹, Anand Prakash ¹, G. P. Srivastava ¹, Manoj Shukla ¹

Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226007, IN

Abstract

The organic matter dispersed in the upper Tertiary sediments of Mahuadanr valley has been studied in detail. It has been observed that the amorphous, structured terrestrial and biodegraded terrestrial organic matter represent the dominant types followed by black debris and fungal fruiting bodies. The dominance of amorphous organic matter suggests the prevalence of reducing conditions in the basin, patticularly during the deposition of the lower part of the sequence. The conditions gradually transformed into oxidising environment during the deposition of upper part of the succession. Besides this, the presence of black debris indicates moderate oxidising environment in the source area and also during the transport of the organic matter.

Keywords

Depositional Environment, Dispersed Organic Matter, Neogene, Mahuadanr Valley, Bihar.

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G. P. Srivastava ¹, Manoj Shukla ¹, Prabhat Kumar ², Madhav Kumar ¹, Anand Prakash ¹

Affiliations
1 Birbal Sahni institute of Palaeobotany, 53 University Road, Lucknow- 226 007, IN
2 Zoology Department, University of Lucknow, Lucknow-226 007, IN

Abstract

The remains of Pillbug and millipede from the resin lumps associated with the Tertiary sediments Kerala coast are reported here for the first time. These remains have been described as Armadillidium payangadensis sp nov and Polyxenus mecanica sp nov. The resin lumps containing Arthropod remains are Found associated with the Tertiary deposits( Warkalli Formation) exposed at several places along Kerala Coast. The fossil bearing resin lumps have been collected from Payangadi China Clay mine, Cannanore Kerala.

Keywords

Warkalli Formation, Pillbug, Upper Tertiary, Millipede Resin, Kerala.

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Shinjini Sarana ¹, Anand Prakash ¹

Affiliations
1 24, Badshah Bagh, Lucknow University Campus, Lucknow - 226 007, IN

Abstract

The microconstituents of Lower Gondwana coals,of Tatapani-Ramkola basin have been studied in detail. It has been observed that besides maceral composition, the mineral matter is also significant in deciphering the depositional environment of coals. The morphological characteristics of these entities along with their quantitative representation have been utilized for the interpretation of petrofacies. On the basis of petrofacies, it is suggested that the vegetal matter mainly deposited dominantly under oxic dry mire conditions, often affected by high tloods formed the bulk of Lower Gondwana coals of Tatapani-Ramkola basin. However, some coals seem to have formed under wet mire system with intermittent moderate to high floods. It is also indicated that the development of coal seams was initiated as limnic peat facies, which later changed into limnotelmatic reed moor, telmatic reed moor and forest moor.

Keywords

Gondwana Coals, Tatapani-Ramkola, Depositional Environment, Petrofacies, Chattisgarh.

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