Lower Mesozoic Megaspores from the Variegated Stage of Salt Range (W. Pakistan)

S.C.D. Sah; K.P. Jain

doi:10.54991/jop.1967.530

Authors

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

DOI:

https://doi.org/10.54991/jop.1967.530

Abstract

A megaspore assemblage, recovered from the Variegated Stage of Nammal Gorge, Salt Range (W. Pakistan), has been described. The assemblage is characterized by the presence of Banksisporites sinuosus Dettmann, Nathorstisporites hoplificus Jung, N. reticulatus Dettmann, N. nammalensis sp. nov., Nathorstisporites peltasticus Jung, Minerisporites sp. and Hughesisporites novus sp. nov. The Salt Range megaspore flora shows closest affinity with the Rhaetic-Liassic megaspores from South Australia and Tasmania. The Jurassic profile in the Nammal Gorge Section of the Variegated Stage are considered by some geologists to range from Middle to Upper Jurassic while others think they may range from Lower to Middle Jurassic. However, the evidence of the megaspore assemblage described here tends to support a Lower Jurassic (Liassic) age for the two lowermost beds of the Variegated Stage of the Nammal Gorge Section.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

Cookson IC & Dettmann ME 1958a. Cretaceous ‘Megaspore’ and a closely associated microspores from the Australian region. Micropalaeontology. 4: 39-49.

Idem 1958b. Some trilete spores from Upper Mesozoic deposits in the eastern Australian region. Proc. roy. Soc. Victoria. 70: 95-128.

Dettmann ME 1961. Lower Mesozoic megaspores from Tasmania and South Australia. Micropaleontology, 7 (1): 71-86.

Dijkstra SJ 1951. Wealden megaspore and their stratigraphical value. Meded. Geol. Sticht. 5: 7-21.

Idem 1955. Some Brazilian megaspores, Lower Permian in age and their comparison with Lower Gondwana Spores from India. Ibid. 9: 5-10.

Fleming 1852. Report on the geological structure and mineral wealth of the Salt Range in the Punjab. J. Asiatic Soc. Bengal. 22: 229-279.

Idem 1853. On the Salt Range of the Punjab. Quart. J. geol. Soc. 9 (1): 189-200.

Gee ER 1947. 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.

Harris TM 1926. The Rhaetic flora of Scoresby sound, East Greenland. Medd. Gronland. 68: 45-147.

Idem 1935. The fossil flora of Scoresby sound, East Greenland, Part. 4: Ginkgoales, coniferales Lycopodiales and Isolated fructifications. Ibid. 112 (1): 1-176.

Idem 1946. Liassic and Rhaetic plants collected in 1936-38 from East Greenland. Ibid. 114 (9): 1-38.

Hughes NF 1955. Wealden plant fossils. Geol. Mag. 92: 201-217.

Jung W 1958. Zur Biologie und Morphologie einiger disperser Megasporen, vergleichbar mit solchen von Lycostrobus scotti, aus dem Rhat-Lias Frankens. Geol. Bl. No-Bayer, 8 (3): 114-130.

Jung W 1960. Die dispersen Megasporen der frankischen Rhat-Lias-Grenzschichten. Palaeontographica, B. 107 (4-6): 127-140.

Krishnan MS 1960. Geology of India and Burma. Madras.

Lundblad B 1956. On the stratigraphical value of the megaspores of Lycostrobus scottii. Preliminary report of some new finds and their interpretation. Sverig. Geol. Underns. 50 (3): 1-11.

Marcinkiewicz & 1957. Liasowe megaspory z Praszki, Zawiercia I Gor Scwietokrzy skich. Poland, inst. geol. Kwart. 1 (2): 299-302.

Murry N. 1939. The microflora of the Upper and Lower Estuarine Series of the East Midlands. Geol. Mag. 76: 478-489.

Potonie R 1956. Synopsis der Gattungen der Sporae dispersae. Teil. I. Sporites. Beih. Geol. J. 23: 1-103.

Reissinger A 1952. Uber den Ursprung der Angiosperms zayrenth. Nat. Ges. Bayrenth, 24.

Sak SCD 1955. Plant microfossils from Jurassic shale of Salt-Range, West Punjab (Pakistan). The Palaeobotanist 4: 60-71. https://doi.org/10.54991/jop.1955.471

Singh HP., Srivastava SK & Roy SK 1964. Studies on the Upper Gondwana of Cutch-1. Mio- und Macrospores. The Palaeobotanist 12 (3): 282-306. https://doi.org/10.54991/jop.1963.666

Sitholey RV 1943. Plant remains from the Triassic of the Salt Range in the Punjab. Proc. nat. Acad. Sci. India. 13 (5): 300-327.

Wadia DN 1939. Geology of India. London.

Wicher CA 1951. Zur mikropalaontologischen Gliederung des nichtmarinen Rhat. Hamburg. Erdol. Kohle. 4: 755-760.

Will HJ 1953. Palaontologische Untersuchungen zur stratigraphie des Ober Keupers in Nord-westdeutschland. Tubingen Univ. Dissertation.

Wynne AB 1878. On the geology of the Salt Range in the Punjab. Mem. geol. surv. India. 14: 1-313.

Znosko J 1955. Rhaetic and lias between Cracow and Wielun. Inst. geol. Prace. 14: 1-146.