A Analysis of Foraminifera Fossils of the Wonosari Formation and the Oyo Formation Shaping the Morphology of the Eastern Mount Sewu Karst
Abstract
Gunungsewu is one of the areas that has the second largest karst landscape in Indonesia. The diversity of morphology in the karst hill area makes this area interesting for research, especially by researchers in the field of geology. In the western region towards Gunung Kidul the formation of karst produces a morphology in the form of conical hills and in the eastern region towards Pacitan produces a morphology dominated by the formation of vertical caves. The Pacitan area is still limited in terms of information on the characteristics of the limestones that make it up, including the fossils that make up the limestones in this area. This paper describes the diversity of foraminifera fossils that make up the Wonosari and Oyo formations. Comparison of samples from the two formations, both planktonic and benthic fossils, shows the age and depositional environment of these two formations. The diversity of foraminifera fossils found in these two formations provides a new perspective on the age order in the Gunungsewu karst area. The presence of abundant Groborotalia mayeri fossils in both formations, which are well preserved, indicates that the Pacitan karst area was formed in the Middle Miocene. Meanwhile, the presence of benthic fossils indicates a deep littoral to neritic depositional environment from the Wonosari Formation and the Oyo Formation
References
ADAMS , C. G., 1970. A RECONSIDERATION OF THE EAST INDIAN LETTER CLASSIFICATION OF THE TERTIARY. Dalam: BULLETIN OF THE BRITISH MUSEUM (NATURAL HISTORY) GEOLOGY Vol. 19 No. 3 . LONDON: Trustees of the British Museum (Natural History), pp. Pp. 85-137; 3 Text-figures .
Almuzzaki, M. I., Nur’aini, S. & Rizqi, A. H. F., 2020. KARAKTERISTIK BATUGAMPING FORMASI OYO BERDASARKAN ANALISIS PETROGRAFI PADA JALAN SAMBIPITU – GADING. KECAMATAN GEDANGSARI – PLAYEN,GUNUNG KIDUL, DAERAH ISTIMEWA YOGYAKARTA. GEODA, pp. Vol. 01, No. 02, SEPTEMBER 2020, pp. 53-66.
Avong, S. J. et al., 2022. BENTHIC FORAMINIFERA BIOSTRATIGRAPHY AND PALEOBATHYMETRY OF SEDIMENTS, NORTHWEST NIGER DELTA.. s.l., s.n.
Bahri, A. S. et al., 2020. Petrography and geochemistry of structural limestones in the Pringkuku Karst area, Pacitan, East Java. AIP Conference Proceedings 2251(1):040002, Issue DOI: 10.1063/5.0015772, pp. INTERNATIONAL CONFERENCE ON ELECTROMAGNETISM, ROCK MAGNETISM AND MAGNETIC MATERIAL (ICE-R3M) 2019.
Bemmelen, R. V., 1949. The Geology of Indonesia Vol IA, General Geology of Indonesia and Adjacent Archipelagoes, 2nd. Netherland: s.n.
Blow, W., 1969. Late Middle Eocene to Recent Planctonic Foraminifera Biostratigraphy, Proc.First Int.. Proc.First Int. Conf. Planktonic Micro Fossilles, E.J. Brill-Leiden. Vol. I, p. p. 199 – 422..
Bolli, H., Saunders, J., Perch & K-Nielsen, 1989. Plankton Stratigraphy, Vol. 1.. s.l.:Cambridge University Press, pp.155 – 328..
Dong, S., Lei, Y., Wu, T. & Li, M., 2023. New evidence for coiling direction of benthic foraminifera as a temperature proxy. Frontiers in Marine Science 10:1122189, p. DOI: 10.3389/fmars.2023.1122189.
Harsono, P., Kadar, D. & Skwarko, S., 1998. Biostratigraphy Cenozoic Planktonic Foraminifera. Foraminifera in Indonesian Stratigraphy Vol. 1. P. 283. s.l.:unpublished.
Hendrizan, M. et al., 2020. Centennial-Millennial Climate Variability in the Makassar Strait during Early Holocene until the End of the Last Deglaciation. International Journal of Oceans and Oceanography, Volume Volume 14, Number 2, pp. pp. 197-220.
Husein, S., 2007. Tinjauan Geomorfologi Pegunungan Selatan DIY/Jawa Tengah: telaah peran faktor endogenik dan eksogenik dalam proses pembentukan pegunungan. Yogyakarta, Seminar Potensi Geologi Pegunungan Selatan dalam Pengembangan Wilayah.
Jurnaliah, L., Syafri, I., Adjat , S. & Kapid, R., 2019. BIOFASIES DAN EKOLOGI PERAIRAN JAWA TENGAH BAGIAN UTARA BERDASARKANKUMPULAN FORAMINIFERA BENTIK KECIL. JURNAL GEOLOGI KELAUTAN , Volume 17(2), p. DOI: 10.32693/jgk.17.2.2019.614.
Kurniandi, M. R., Ediyanto & Nugroho, . A. R. B., 2017. GEOLOGI DAN STUDI FASIES BATUGAMPING FORMASI WONOSARI DAERAH BATURETNO DAN SEKITARNYA KECAMATAN DAMPIT, KABUPATEN MALANG, PROVINSI JAWA TIMUR. Jurnal Ilmiah Geologi Pangea , pp. Vol. 4, No. 1, Juni .
Kusuma, D. N. W. et al., 2019. Diversity Of Benthic Foraminifera Of Core ‘A’ As A Marine EnvironmentIndicator In The Waters Of Jepara, Central Java. Journal of Physics Conference Series , Volume 1363(1):012024, pp. DOI: 10.1088/1742-6596/1363/1/012024.
Loeblich, . A. & Tappan, . H., 1988. Foraminiferal Genera and Their Classification. New York. 970p: Van Nostrand Reinhold Company.
Morard, R. et al., 2022. Renewal of planktonic foraminifera diversity after the Cretaceous Paleogene mass extinction by benthic colonizers. Nature Communications, pp. 13(1):7135 DOI: 10.1038/s41467-022-34794-5.
Murray, . J. W., 2006. Ecology and applications of benthic foraminifera. s.l.:Cambridge university press.
Patriani, E. Y., Yurnaldi, D. & Setyawan, R., 2021. Peninjauan Kembali Keragaman Fosil Foraminifera untuk Penentuan Umur Batugamping Formasi Karangbolong. Jurnal Geologi dan Sumberdaya Mineral , 22(DOI: 10.33332/jgsm.geologi.v22i2.555), pp. 67-79.
Salindeho, L. M., Agustine, W., Saputro, S. P. & Naufal, Z., 2020. NALISIS MIKROFOSIL DESA DAGANGAN DAN WUKIRHARJOKABUPATEN TUBAN CEKUNGAN JAWA TIMUR UTARA. Surabaya, ITATS.
Samodra, H. & Gafoer, S., 1990. Laporan Geologi Lembar Pacitan, skala 1:100.000, Bandung: Puslitbang Geologi. Laporan Terbuka.
Surono, 1992. Laporan Geologi Lembar Surakarta-Giritontro, skala 1:100.000. Laporan Terbuka penyunt. Bandung: Puslitbang Geologi.
Surono, 2009. Litostratigrafi Pegunungan Selatan Bagian Timur Daerah Istimewa Yogyakarta dan Jawa Tengah. JURNAL GEOLOGI DAN SUMBERDAYA MINERAL.
