VARIASI KOMPOSISI DINDING CANGKANG FOSIL FORAMINIFERA BENTONIK UNTUK PENENTUAN LINGKUNGAN PENGENDAPAN DAERAH SUNGAI OYO, DESA BEJI, KECAMATAN PATUK, KABUPATEN GUNUNGKIDUL, DAERAH ISTIMEWA YOGYAKARTA

Authors

  • Dina Tania Jurusan Teknik Geologi, IST AKPRIND Yogyakarta
  • Desi Kiswiranti Jurusan Teknik Geologi, IST AKPRIND Yogyakarta

Keywords:

Bentonic Foraminifera, Deposition Environment, Fossil, Oyo River

Abstract

The Oyo River, which stretches relatively northwest - southeast in Beji Village, has seven rock facies that make up the Sambipitu Foundation with marl lithology, then the Oyo Formation is deposited on it with claystone lithology, breccia, tuff and sandstones, and the Wonosari Formation with calcirudite lithology and calcarenite based on stratigraphic measurements as thick as 165 meters with dips ranging from 5o-15o. The variation in the composition of the bentonic foraminifera shell wall in the Oyo River rocks reflects environmental changes from normal marine lagoon and carbonate platforms to a continental slope and sea shelf when referring to the triangular plot of Murray (1991) and Brasier (1980) based on the type of shell composition Loeblich and Tappan (1988). The existence of sedimentary structures also shows a transition from a lower fan in the Sambipitu Formation to a suprafan lobes on the mid fan in the Oyo Formation based on the underwater fan model Walker (1978) and ending up as an inner ramp according to Buchette and Wright (1992) by Tania (2019). This is in line with the depositional environment by Tipsword et.al. (1966) and the foraminifera group by Bignot (1982) which shows that the Sambitu Formation is dominated by porcelaneous in the middle bathyal, then the Oyo Formation is dominated by agglutine in the upper bathyal and the Wonosari Formation on the outer-inner neritic is dominated by porcelaneous.middle bathyal, then the Oyo Formation is dominated by agglutine in the upper bathyal and the Wonosari Formation on the outer - inner neritic is dominated by porcelaneous.

References

Boltovskoy E. and R. Wright, 1976. Recent Foraminifera. Dr. W. June, B.V. Publisher, The Haque, Netherland.

Bothe A.Ch.D., 1929. Jiwo Hills and Southern Range. Fourth Pasific Sciences Conggress Excursion Guide, p.14.

Brasier M., 1980. Microfossils. George Allen & Unwin, p. 193.

Leckie R.M. & Olson H.C., 2003. Foraminifera as Proxies For Sea-Level Change on Silisiclastic Margins. SEPM Special Publication No. 75. ISBN 156576-084-0, p. 5-19.

Loeblich A.R. and Tappan H., 1964. Sarcodina, Chiefly Thecamoebians and Foraminifera. In: Treatise on Invertebrate Paleontology: Prosita 2, C, p.1-900.

Murray J.W., 1991. Ecology and Paleoecology of Benthic Foraminifera. Longman Scientific & Technical, p. 397.

Pandita H., 2008. Lingkungan Pengendapan Formasi Sambipitu berdasarkan Fosil Jejak di Daerah Nglipar. JTM, ITB, Vol. 15 No. 2, ISSN 0854-8528, hal. 85-94.

Postuma J.A., 1971. Manual of Planktonic Foraminifera. Elsevier Publishing Company, Amsterdam.

Surono, 2009. Stratigrafi Pegunungan Selatan Bagian Timur Daerah Istimewa Yogyakarta dan Jawa Tengah. Geo-Sciences, JSDG Vol. 19 No. 3, Pusat Survey Geologi, Bandung, hal. 209-221.

Tania D., 2019. Perkembangan Lingkungan Pengendapan dari Formasi Sambipitu ke Formasi Wonosari Daerah Jelok Desa Beji Kecamatan Patok Kabupaten Gunungkidul Daerah Istimewa Yogyakarta. Technoscientia, Vol. 11 No. 2, hal. 193-201.

Tipsword H.L., Setzer F.M., and Smith F.L. Jr., 1966. Interpretation of Depositional Environment in Gulf Coast Petroleum Exploration from Paleoecology and Related Stratigraphy. Transaction G.C., Assoc. Geol. Soc.

Toha B., 2015. Stratigrafi dan Sedimentasi Batuan Campuran Karbonat dan Silisiklastik Formasi Oyo, Jalur Sungai Oyo, Desa Bunder, Kecamatan Patuk, Kabupaten Gunung Kidul, Daerah Istimewa Yogyakarta. Online Public Access Catalog (OPAC) Integrasi, Universitas Gadjah Mada Yogyakarta.

Valchev B., 2003. On The Potential of Small Benthic Foraminiferal as Paleoecology indicators: Recent Advances. 50 Years University of Mining and Geology “St.Ivan Rilski”. Annual. Vol. 46, Part I, Geology and Geophysics, Sofia, p. 189-194.

Van Marle L.J., 1989. Benthic Foraminifera From Banda Arc Region, Indonesia and Their Paleobathymetric Significance For Geologic Interpretations of The Late Cenozoic Sedimenary Record. Free University Press, Amsterdam; p. 271.

Downloads

Published

2020-11-14 — Updated on 2020-11-19

Versions