Plant microfossils from a Jurassic shale of Salt Range, West Punjab (Pakistan)

S.C.D. Sah

doi:10.54991/jop.1955.471

Authors

S.C.D. Sah Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow 226007, India

DOI:

https://doi.org/10.54991/jop.1955.471

Abstract

The paper describes a rich variety of microfossils obtained by maceration from the variegated shale of the Salt Range. The microflora includes several kinds of spores, both winged and unwinged; few megaspore-like bodies; fragments of wood; and several cuticular pieces. The spores are mostly pteridophytic and coniferous, the cycadophytic grains being rare. Among the large number of cuticles considerable proportion are of the Brachyphyllum and Pagiophyllum type, indicating that coniferales were strongly represented in the flora. Others with sinuous epidermal cells and syndetocheil type of stomata, suggesting a Bennettitalean affinity, are least represented.

The spores and pollen grains are described under Naumova's (1937) artificial system. New subgroups have been proposed for spores and pollen grains which do not fit in any of the known subgroups. The microflora as a whole suggests a middle Jurassic age for the variegated shale.

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References

BLACK, M. (1929). Drifted plant-beds of the upper estuarine series of Yorkshire. Quart, Jour. Geol. Soc. 85 (4): 389-437.

CHATTERJEE, S. (1943). A taxonomic study of the Indian Gymnosperms on the basis of pollen and cuticle structure. Thesis for the degree of M. Sc. of the Lucknow University. Unpublished.

DIJKSTRA, S. J. (1948-49). Megaspores and some other fossils from the Aachemian (Senonian) in South Limburg, Netherlands. Med. Van. De. Geol. Stich. N. S. (3): 19-32.

Idem (1951). Wealden megaspores and their stratigraphical value. Med. Van. de Geol. Stich. N. S. (5): 7-21.

ERDTMAN, G. (1954). An introduction to pollen analysis. Waltham, Mass.

FEISTMANTEL, O. (1880). Notes on fossil plants from Kattywar, Shekh Budin, and Sirgujah, Rec. Geol. Surv. India. 13: 64-65.

FITTING, H. (1907). Sporen in Buntsandstein; die Makrosporen von Pleuromeia? Ber. deutsch. Bot. Gesel. 25: 434-442.

FLORIN, R. (1936). On the structure of the pollen grains in the Cordaitales. Svensk. Bot. Tids. 30: 624-651.

GEE, E. R. (1946). Further note on the age of the Saline Series of the Punjab and of Kohat. Proc. Nat. Acad. Sci. India. 16 (2-4): 95-154.

GUENNEL, G. K. (1952). Fossil spores of the Alleghenian coals in Indiana. Geol. Surv. Indiana. Dept. Conserv., Progress Report No. 4.

HARRIS, T. M. (1935). The Fossil Flora of Scoresby Sound, East Greenland. Part 4. Medd. Om. Gronl. 112 (1).

Idem (1937). Ibid. Part 5. Medd. Om. Gronl. 112 (2).

HOLDEN, R. (1915). On the cuticles of some Indian Conifers. Bot. Gaz. 60 (3): 215-227.

KNOX, E. (1938). Spores of Pteridophyta. Trans. And Proc. Bot. Soc. Edin. 32(3): 438-466.

Idem (1950). The spores of Lycopodium, Phylloglossum, Selaginella and Isoetes and their value in the study of Microfossils of Palaeozoic age. Trans. And Proc. Bot. Soc. Edin. 35 (3): 209-357.

LUNDBLAD, B. (1948). A Selaginelloid strobilus from East Greenland. Medd. fra Dansk Geol. Forening. 11 (3): 351-363.

Idem (1950). On a fossil Selanginella from the Rhaetic of Hyllinge, Scania. Svensk. Bot. Tids. 44 (3): 477-486.

MEHTA, K. R. (1944). Palaeobotany in India – 5. Proc. Nat. Acad. Sci. India. 14 (1-2): 67-91.

MINER, E. L. (1932). Megaspores ascribed to Selaginellites, from the upper cretaceous coals of Western Greenland. Jour. Wash. Acad. Sci. 22 (18-19): 497-506.

MURRAY, N. (1939). The microflora of the upper and lower Estuarine series of the East Midlands. Geol. Mag. 76: 478-489.

NAUMOVA, S. N. (1937). Spores and Pollen of the Coals of U.S.S.R. XVII International Geol. Cong. Moscow: 353-364.

PANT, D. D. (1943). Palaeobotany in India – 4. Jour. Ind. Bot. Soc. 22 (2-4): 171-182.

PURI, G. S. (1945). Some abnormal pollen grains of Pinnus excelsa Wall. Curr. Sci. 14 (10): 252-256.

RAO, A. R. (1936). Winged pollen from the Jurassic of India. Proc. 23rd Ind. Sci. Cong. Indore: 304.

Idem (1943). Jurassic spores and sporangia from the Rajmahal Hills, Bihar. Proc. Nat. Acad. Sci. India. 13 (3): 181-197.

SAH, S. C. D. (1953). Spores and other Micro-remains from a Carbonaceous shale (Jurassic) in Andigama, Ceylon. Spolia Zeylanica. 27 (1): 1-12.

SAHNI, B. (1928). Revisions of India Fossil Plants; Coniferales (a. Impressions and Incrustations). Mem. Geol. Surv. India. Pal. Ind. N. S. 11. 1-49.

SAHNI, B. & SITHOLEY, R. V. (1945). Some Mesozoic ferns from the Salt Range, Punjab. Proc. Nat. Acad. Sci. India. 15 (3): 61-73.

SAHNI, B., SITHOLEY, R. V. & PURI, G. S. (1948). Palaeobotany in India – 6. Jour. Ind. Bot. Soc. 26 (4).

SCHOPF, J. M. (1938). Spores from the Herrin (No. 6) coal bed in Illinois. State. Geol. Surv., Rept. Inv. (50): 1-55.

SELLING, O. H. (1944). Studies in the recent and fossil species of Schizaea, with particular reference to their spore characters. Med. Fran Gote Bot. Trad. 16: 1-112.

SEWARD, A. C. (1913). A British fossil Selaginella. New Phytologist. 12 (3): 85-89.

Idem (1919). Fossil Plants. 4. Cambridge.

SITHOLEY, R. V. (1949). Protopteris nammalensis sp. nov., a Jurassic cyatheaceous tree-fern from the Salt Range, Punjab. Proc. Nat. Inst. Sci. India 15 (1): 1-10.

SZE, H. C. (1933). Jurassic plants from Shensi, Mem. Nat. Res. Inst. Geol. Acad. Sinica. (13): 77-86.

THOMAS, H. H. (1911). On the spores of some Jurassic ferns. Proc. Camb. Phil. Soc. 16 (4): 384-388.

THOMPSON, R. B. (1909). On the pollen of Microcachrys tetragona. Bot. Gaz. 47: 26-29.

THOMPSON, P. W. & PFLUG, H. (1953). Pollen und Sporen des Mitteleuropaischen Tertiars. Palaeontographica. 94 (B): 1-38.

VISHNU-MITTRE. (1954). Petrified spores and pollen grains from the Jurassic rocks of Rajmahal Hills, Bihar. The Palaeobotanist. 3.

WADIA, D. N. (1939). Geology of India. London.

WIELAND, G. R. (1906-16). American fossil cycads. 1, 2.

WILSON, L. R. & COE, E. A. (1940). Description of some unassigned plant microfossils form the Des Moines Series of Iowa. Amer. Mid. Naturalist. 23 (1): 182-186.

WODEHOUSE, R. P. (1935). Pollen Grains. London.

Idem (1944). Symposium on the Age of the Saline Series Proc. Nat. Acad. India. 14 (6).

Idem (1946). Second Symposium on the Age of the Saline Series. Ibid. 16 (2-4).