Oligocene Palynology Of On-Shore West Java

Eko Budi Lelono

Abstract


Compared to its counterpart in the off-shore area (including Northwest Java and Northeast Java), the Oligocene sediment of on-shore West Java provides low pollen assemblages. In addition, superwet elements of Dacrydium and Casuarina commonly occurred in off-shore area are less represented in the on-shore area. However, it is believed that the study area still experienced wet climate condition as proved by common occurrence of rattan pollen Dicolpopollis spp. indicating a thick growth of swamp forest under moist climate. Unlike its counterpart in the off-shore North West Java, the studied sediment rarely yields lacustrine elements suggesting the disappearance of lake deposit. The Oligocene sediment of on-shore West Java is defi ned by the regular appearance of Oligocene marker of pollen Meyeripollis naharkotensis. The last occurrence of this pollen marks the top Oligocene age. In fact, the appearance of pollen M. Naharkotensis is obviously used to separate Oligocene age from Miocene age in the off-shore area. Moreover, marine micropaleontology analysis on foraminifers and calcareous nannoplankton confi rms this age. The studied sediment was deposited in the transition to shallow marine environment as indicated by rare occurrence of marine microfossils. The common brackish pollen of Zonocostites ramonae (Rizophora) and Spinizonocolpites echinatus (Nypa) indicates mangrove/ back-mangrove environment. Moreover, the domination of shallow water benthonic over the planktonic forms suggests shallow marine setting.


Keywords


Palynology, Oligocene, On-shore West Java

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References


Adams, C. G., 1970. Reconsideration of the East

Indian Letter Classifi cation of the Tertiary. Bull. Brit.

Mus. (Nat. Hist.). vol.19 (3).

Adnan, A., Sukowitono and Supriyanto. 1991.

Jatibarang Sub Basin – A Half Graben Model in the

On-shore of Northwest Java. Proceedings Indonesian

Petroleum association, Twentieth Annual Convention,

Volume I: Exploration and Geothermal.

Blow, W.H., 1969. Late Middle Eocene to Recent

Planktonic Foraminiferal Biostratigraphy. In Proc. 1st

Int. Conf. Plank. Microfossils. pp. 191-422.

Lelono, E. B., 2000. Palynological Study of the Eocene

Nanggulan Formation, Central Java, Indonesia.

Unpublished PhD Thesis. University Of London.

Lelono, E. B. 2001. Revisi Zonasi Polen Eocene.

Lembaran Publikasi Lemigas, Volume 35, Nomer 1,

pp. 16-26.

Lelono, E. B. 2006. Eocene-Oligocene Climate

Based on Palynological Records. Lemigas Scientifi c

Contributions to Petroleum Science and Technology,

Volume 29, Number 2, pp. 10-23.

Lelono, E. B. and Morley R. J., 2011. Oligocene

Palynological Zonation Scheme From East Java Sea.

Scientific Contribution Oil and Gas, Volume 34,

Number 2, pp 95-104.

Martini, E., 1971. Standard Tertiary and Quaternary

Calcareous Nannoplankton Zonation in Farinacci,

A. (Ed), Proc. 2nd Plank. Conf. Roma, pp. 739-784.

Edizioni Tecnoschienza, Roma.

Morley, R. J., 1977. Floral Zones Applicable to

Neogene of Eastern Kalimantan. Unpublished Report.

pp. 1-5.

Morley R.J., 1991. Tertiary stratigraphic palynology

in South-East Asia; current status and new directions.

Proceedings of the Geological Society of Malaysia 28,

pp 1-36.

Morley, R. J., 2000. Origin and Evolution of Tropical

Rain Forests. Wiley, London.

Rahardjo, A. T., Polhaupessy, A. A., Wiyono, S.,

Nugrahaningsih, L. and Lelono, E. B., 1994. Zonasi

Polen Tersier Pulau Jawa. Proc. IAGI, 23rd Annual

Convention.




DOI: https://doi.org/10.29017/SCOG.35.2.779

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