PALYNOSTRATIGRAPHIC STATUS AND DEPOSITIONAL ENVIRONMENT OF GIRUJAN CLAY AND DUPITILA FORMATION EXPOSED ALONG SHARI RIVER (DIGRAIL) AND DUPIGAON, SYLHET, BANGLADESH

Authors

  • S. K. Saha Environmental Science Discipline, Khulna University, Khulna 9208, Bangladesh
  • R.Y. Singh Centre of Advanced Studies in Geology, Panjab University, Chandigarh 160014, India

DOI:

https://doi.org/10.53808/KUS.2000.2.2.0045-L

Keywords:

Girujan clay; DupiTila; Palynostratigraphy; Pliocene; Pleistocene; Sylhet; Bangladesh

Abstract

The Girujan Clay Formation is demarcated as Bangladeshopollenites barishalensis Zone, which is equivalent to middle-upper Siwalik sediments of Punjab Basin. The mangrove and coastal palynotaxa present in this formation indicate that these sediments have been deposited under the delta condition in a supratidal environment. The Girujan Clay Formation is considered to be of Mio-Pliocene in age. The DupiTila Formation is recognized here as Corrugatisporites sp. Zone. This formation is equivalent to Namsang bed of Assam-Meghalaya region. The palynological assemblage of this formation is suggestive of a high degree of precipitation and the presence of rainfed river system prevailing in the basin of deposition. It is of Plio-Pleistocene in age.

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References

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Published

29-11-2000

How to Cite

[1]
S. K. . Saha and R. . Singh, “PALYNOSTRATIGRAPHIC STATUS AND DEPOSITIONAL ENVIRONMENT OF GIRUJAN CLAY AND DUPITILA FORMATION EXPOSED ALONG SHARI RIVER (DIGRAIL) AND DUPIGAON, SYLHET, BANGLADESH”, Khulna Univ. Stud., pp. 283–290, Nov. 2000.

Issue

Section

Life Science

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