Fossil diatoms and Biostratigraphy of the lower Karewa formation of Kashmir

D.K. Roy

doi:10.54991/jop.1972.1474

Authors

D.K. Roy Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India

DOI:

https://doi.org/10.54991/jop.1972.1474

Abstract

During the course of geological mapping of the Karewa sediments of Kashmir to assess the economic potentialities of diatomaceous earth, the author collected nearly one thousand samples from 32 measured sections. The samples were analysed for fossil diatoms.

The study has indicated that while the lower Karewa is very rich in fossil diatoms, the upper Karewa is devoid of them. It is further observed that there is a uniformity in the trend of distribution and assemblages of fossil diatoms in the lower Karewa beds. Based on these two factors, the lower Karewa is divided into two biozones, the lower - Centrales Assemblage Zone, characterized by the predominance of centric diatoms and the upper – Pennales Assemblage Zone, characterized by the predominance of pennate diatoms.

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References

Colom G 1952. Aquitanian-Burdigalian diatom deposits of the North Betic Strait, Spain. J. Palaeont. 2(6): 867-885.

De Terra H & Peterson TT 1939. Studies on the Ice Age in India and associated human cultures. Publs. Carnegie Instn. 493: 1-354.

Fristsch FF 1956. Structured and reproduction of Algae. Vol. 1, London.

Hanna GD 1927a. The lowest known Tertiary diatoms in California. J. Palaeont. 1(2); 103-127.

Hanna GD 1927b. cretaceous diatoms from California. Occ. Pap. Calif. Acad. Sci., 13: 1-46.

Hanna GD & Grant WM 1929. Brakishwater Pliocene diatoms from the Etchegoin formation of Central California. Ibid. 8(3): 352-355.

Hertlein LG 1933. Additions to the Pliocene fauna of Turtle Bay, Lower California, with a note on the Miocene diatomite. Ibid. 7(4): 439-441.

Ichikawa W 1950. The correlation of the diatom-bearing Mudstones in the Noto Peninsula and the vicinity of Kanazawa city. J. geol. Soc. Japan. 56: 56 (Abstr.).

Ichikawa W 1967. Fossil diatoms and geology (in Japanese). Ibid. 73(2): 53-62.

Iyengar MOP & Subramanyan R 1943. Fossil diatoms from the Karewa beds of Kashmir. Proc. natn. Acad. Sci. India. 13B: 225-237.

Krishtofovish AN and others 1949. Diatom analysis. Vol. 1. (in Russian), Moscow.

Lydekker R 1878. Notes on the geology of Kashmir, Krishtwar and Pangi. Rec. geol. Surv. India. 11: 30-64.

Lydekker R 1883. The geology of Kashmir and Chamba Territories and the Britsh district of Khagam. Mem. geol. Surv. India. 22: 1-344.

Middlemiss CS 1923. Lignitic coal fields in the Karewa formation of Kashmir valley. Rec. geol. Surv. India. 55(3): 241-253.

Nair PKK 1960. Palynological investigations of the Quaternary (Karewa) of Kashmir. Scient. Ind. Res. 19C (6): 145-154.

Okuno H 1952. Atlas of fossil diatoms from Japanese diatomite deposits. Bot. Inst., Fac. Textile Fibers. Kyoto Univ. Industr. Arts & Textile Fibers, Japan. Kyoto.

Pilgrim GE 1944. Lower limit of the Pleistocene in Europe and India. Geol. Mag. 81: 28-38.

Rao AR & Awasthi P 1962. Diatoms from the Pleistocene of Kashmir (India) – Part I. Centric Diatoms. The Palaeobotanist. 11 1&2: 82-91. https://doi.org/10.54991/jop.1962.626

Roy DK 1970. Fossil diatoms from the Karewas of Kashmir. Inidan Miner. 24(3): 307-309.

Roy DK 1971. Stratigraphy and Palaeontology of the Karewa Group of Kashmir. Seminar on Recent Geological Studies in the Himalayas, Calcutta 1971, Abstr. Pp. 12-13.

Tripathi C & Chandra PR 1962. Detailed examination of the Karewas of Kashmir for the remains of early man. Unpublished report, Geol. Surv. India.

Vishnu-Mittre, Singh G & Saxena KMS 1962. Pollen analytical investigation of the Lower Karewas. The Palaeobotanist. 11, 1&2: 92-95. https://doi.org/10.54991/jop.1962.627

Wadia DN 1941. Pleistocene Ice Age deposits of Kashmir. Proc. natn. Inst. India. 7(1): 49-59.

Wadia DN 1948. The transitional passage of Pliocene into the Pleistocene in the North-Western Sub-Himalayas. XVIII Intr. Geol. Congr. XI. Sec. K: 43-48.

/09/2023

Wonehouse RP & De Terra H 1935. Pleistocene pollen of Kashmir. Mem. Conn. Acad. Arts Sci. 9, 1-18.