Bulletin of Scientific Contribution

Analisis polen dilakukan pada sampel yang diambil dari  singkapan  di Sungai Cijurai, Kabupaten Sumedang. Tujuan penelitian untuk merekonstruksikan palinomof pada masanya, umur relatif dan lingkungan pengendapan. Preparasi menggunakan metode hidrogen peroksida. Diperoleh palinomrorf yang terdiri dari  polen, spora pteridophya, foraminifera test linings, dan dinoflagellate cyst.  Secara garis besar asal palinomorf  dikelompokan menjadi dua yaitu palinomorf  marine dan terestrial. Terestrial  palinomorf terdiri dari polen dan spora kelompok  mangrove, back mangrove, freshwater swamp and mountain.   Palinomorf laut terdiri dari foraminifera test linings dan  dinoflagellate cyst. Komponen dinoflagellate cyst meliputi Peridinium, Protoperidinium  dan Spiniferites.  Ditemukan Polen penanda umur  Florschuetzia meridionalis, Florschuetzia levipoli,  Stenochlaenidites papuanus, Impatiensidites brevicolpus, dan Dacrycarpites australiensis. Sampel CJ-I  dengan umur relatif  Pliosen, sedangkan dua sampel diatasnya CJ2-02 dan CJ-3  adalah Pliosen akhir. Dari sampel bagian bawah ke posisi bagian atas sampel menunjukkan adanya perubahan  kuantitas palinomorf, keragaman maupun perbandingan jumlah palinomorf laut  dan terestrial. Nilai Index PMI berturu-turut dari CJ-1 sebesar 14,28, CJ-2 sebesar 13,63 dan CJ-3 sebesar 24,13. Seluruh nilai PMI kurang dari 51% yang mengindikasikan pengendapan berlangsung pada lingkungan  air payau, pada zona pasang surut air laut

Arpandi, D. & Sujitno Patmosukismo (1975)- The Cibulakan Formation as one of the most prospective

stratigraphic units in the North-West Java basinal area. Proc. 4th Ann. Conv. Indon. Petroleum Assoc. (IPA), Jakarta, 1, p. 181-207.(Description of stratigraphy of NE Java Basin. Late Oligocene- M Miocene Cibulakan Fm is first transgressive-regressive sequence, followed by Parigi and Cisubuh Fms as second transgressive-regressive sequence. Lower Cibulakan Fm clastics, M Cibulakan Fm limestone of zones Late Te- Early Tf, with up to 640m thick buildups. Volcanic Jatibarang Fm and Cibulakan Fms are main hydrocarbon targets in basin)

Aswan; s. Rijani, and Y. R. (2013). Shell Bed Identification of Kaliwangu Formation and its Sedimentary Cycle Shell Bed Identification of Kaliwangu Formation and its Sedimentary Cycle Significance , Sumedang , West Java Identifikasi Lapisan Cangkang dan Signifikansi Siklus Sedimentasinya. Ijog, 8(May 2016), 1–11. https://doi.org/10.17014/ijog.8.1.1-11

Helenes, J., De Guerra, C., & Vasquez, J. (1998). Palynology and chronostratigraphy of the

Upper Cretaceous in the subsurface of the Barinas area, western Venezuela. AAPG Bulletin, 82(7), 1308–1328. https://doi.org/10.1306/1d9bca61-172d-11d7-8645000102c1865d

Hillen. R. 1984. A Paleontological Technique to Delineate Tropical Lowland Depositional Environments of Quarternary Age, CCOP Project, United Nation Development Programme, Technical Support for Regional offshore Prospecting in East Asia

Martodjojo, S., (2003), Evolusi Cekungan Bogor Jawa Barat: ITB Press, Indonesia. 238 p

Morley, R. J. (1991). Tertiary stratigraphic palynology in Southeast Asia: current status and

new directions. Bulletin of the Geological Society of Malaysia, 28(November), 1–36. https://doi.org/10.7186/bgsm28199101

Morley, R. J. (1998). Palynological evidence for Tertiary plant dispersals in the SE Asian

region in relation to plate tectonics and climate. Biogeography and Geological Evolution of SE Asia, 211–234.

Rodríguez-Gómez, C. F., Vázquez, G., Aké-Castillo, J. A., Band-Schmidt, C. J., & Moreno-Casasola,

P. (2019). Physicochemical factors related to Peridinium quadridentatum (F. Stein) Hansen (Dinophyceae) blooms and their effect on phytoplankton in Veracruz, Mexico. Estuarine, Coastal and Shelf Science, 230. https://doi.org/10.1016/j.ecss.2019.106412

Shi-Mei Liu, Donat-P. Häder, Wolfram Ullrich, 1990. Photoorientation in the freshwater

dinoflagellate, Peridinium gatunense Nygaard, FEMS Microbiology Ecology, Volume 6, Issue 2, February 1990, Pages 91–101, https://doi.org/10.1111/j.1574-6968.1990.tb03929

Tomlinson, PB. 1986. The Botany of Mangroves. Cambridge University Press, Cambridge,

U.K: 419 pp.

Unggul P.W; Asawan, A; Yahdi Zaim; Yan Rizal (2012). Perubahan Lingkungan Pengendapan pada

Beberapa Daerah di Pulau Jawa Selama Plio-Plistosen Berdasarkan Kajian Paleontologi Moluska. May, JTM Vol. XIX No. 4/2012

Wightman, GM. 1989. Mangroves of the Northern Territory. Northern Territory Conservation

Commission of the Northern Territory, Palmerston, N.t., Australia. Botanical Bulletin No. 7.