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Pollen and Foraminifera Approaches to Identify Sediment Sources In The River Mouth Mahakam East Kalimantan Winantris, Winantris; Jurnaliah, Lia
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 4 (2017): JGEET Vol 02 No 04 : December (2017)
Publisher : UIR PRESS

The central role of Mahakam River in the construction of Mahakam Delta is to supply sediment from terrestrial to the river mouth. The river upstream comes from Mount Camaru and the downstream part terminate at Makasar Strait. The surrounding area of the river is overgrown by wet tropical flora that produces pollen. The existence pollen in river sediments as an indicator that sediment came from terrestrial, and foraminifera as an indicator that sediment came from marine. The ratio changes of pollen to foraminifera show that there were differences of sediment source supply. The study was conducted at the river mouth. A shallow core, 200 cm depth, composed of sand and mud and sandy mud, from it taken vertically 11 samples to be analyzed pollen and foraminifera. Sample preparation was using standard methods acetolysis. Meanwhile, sample preparation of foraminifera using Hydrogen Peroxide method. Pollen found at all samples, but foraminifera only found in 8 samples. The data indicating that sedimentation process in the mouth of a river not only gets sediment supplies from terrestrial but also from marine. The quantity of pollen and foraminifera varies vertically. The frequency of pollen much higher than foraminifera that indicates of source sediments dominance came from terrestrial which carried by Mahakam river current. Sonneratia caseolaris pollen continuously found in all samples. Stictogongylus vandiemensis is species foraminifera the most common that followed by Ramulina confossa, both of them come from the sea particularly from the shallow sea.  

Pemodelan Kondisi Lingkungan Sag pond Sesar Lembang, Berdasarkan Analisis Kandungan Alga, Lembang, Jawa Barat Rachman, Rizki Satria; Winantris, Winantris; Jurnaliah, Lia; Fauzielly, Lili
Al-Kauniyah: Jurnal Biologi Vol 14, No 2 (2021): AL-KAUNIYAH JURNAL BIOLOGI
Publisher : Department of Biology, Faculty of Science and Technology, Syarif Hidayatullah State Islami

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/kauniyah.v14i2.15420

AbstrakAlga merupakan mikroorganisme fotosintesis yang tidak memiliki tubuh sejati dengan distribusi lingkungan yang sangat luas dan memiliki banyak fungsi, salah satunya sebagai indikator perubahan lingkungan. Wilayah Cekungan Bandung telah dilakukan penelitian dari beberapa aspek. Akan tetapi, penelitian terutama dari aspek alga yang memperlihatkan perubahan lingkungan belum dilakukan pada daerah tersebut. Penelitian ini dilakukan untuk melihat bagaimana perubahan lingkungan dari endapan sag pond bekas Danau Bandung pada wilayah Cekungan Bandung menggunakan keberagaman alga dan ukuran butir sedimen. Metode asam dilakukan untuk memisahkan alga dari endapan, serta deskripsi batuan dilakukan untuk melihat ukuran butir endapan pada lokasi penelitian. Analisis data dan pemodelan dilakukan dengan mengelompokkan alga sesuai dengan kondisi habitatnya yang terbagi menjadi kelompok Pinnularia, Euglena, Acrinastrum dan Dinobryon. Hasil penelitian menunjukkan bahwa lokasi penelitian mengalami empat kali perubahan lingkungan yang dibagi kedalam zona-zona dan subzona. Setiap zona tersebut diawali dengan kondisi air tercemar yang ditandai oleh peningkatan kelompok Euglena dan ukuran butir halus dari sedimen. Sedangkan pada bagian akhir, perairan memperlihatkan kondisi air normal yang ditunjukkan dengan peningkatan kelompok Pinnularia dan ukuran butir sedimen yang menjadi lebih kasar.AbstractAlgae is known as a photosynthetic microorganism that donâ€™t have a true body with very broad distributions of the environment. Algae have a lot of functions, one of which is an indicator of environmental change. The Bandung Basin area has been researched from several aspects. However, research especially from the algae aspect that shows environmental changes, has not been carried out in this area. This research was conducted to see how the environmental changes of Lake Bandung sag pond deposits in the Bandung Basin by using algae diversity and grain size deposits. The acetolysis method is carried out to see algae content in the sediment, and rock description is carried out to see the grain size of the sediment in the study area. Furthermore, data analysis and modeling were conducted by grouping algae according to environmental conditions which are divided into Pinnularia group, Euglena group, and other groups. The result showed that the study area occurred four times in environmental changes which were divided into zones and subzones. Each zone initially had polluted water conditions characterized by an increase in Euglena groups and the fine grain size of sediment. While in the end, the waters showed normal water conditions characterized by an increase in Pinnularia group and the grain size of the sediment became coarser.

Pollen and Foraminifera Approaches to Identify Sediment Sources In The River Mouth Mahakam East Kalimantan Winantris Winantris; Lia Jurnaliah
Journal of Geoscience, Engineering, Environment, and Technology Vol. 2 No. 4 (2017): JGEET Vol 02 No 04 : December (2017)
Publisher : UIR PRESS

The central role of Mahakam River in the construction of Mahakam Delta is to supply sediment from terrestrial to the river mouth. The river upstream comes from Mount Camaru and the downstream part terminate at Makasar Strait. The surrounding area of the river is overgrown by wet tropical flora that produces pollen. The existence pollen in river sediments as an indicator that sediment came from terrestrial, and foraminifera as an indicator that sediment came from marine. The ratio changes of pollen to foraminifera show that there were differences of sediment source supply. The study was conducted at the river mouth. A shallow core, 200 cm depth, composed of sand and mud and sandy mud, from it taken vertically 11 samples to be analyzed pollen and foraminifera. Sample preparation was using standard methods acetolysis. Meanwhile, sample preparation of foraminifera using Hydrogen Peroxide method. Pollen found at all samples, but foraminifera only found in 8 samples. The data indicating that sedimentation process in the mouth of a river not only gets sediment supplies from terrestrial but also from marine. The quantity of pollen and foraminifera varies vertically. The frequency of pollen much higher than foraminifera that indicates of source sediments dominance came from terrestrial which carried by Mahakam river current. Sonneratia caseolaris pollen continuously found in all samples. Stictogongylus vandiemensis is species foraminifera the most common that followed by Ramulina confossa, both of them come from the sea particularly from the shallow sea.

PALEOBATIMETRI FORMASI JATILUHUR BERDASARKAN KUMPULAN FORAMINIFERA KECIL PADA LINTASAN SUNGAI CILEUNGSI, KABUPATEN BOGOR, JAWA BARAT Lili Fauzielly; Lia Jurnaliah; Ria Fitriani
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 28, No 2 (2018)
Publisher : Indonesian Institute of Sciences

Formasi Jatiluhur di sekitar Sungai Cileungsi merupakan lingkungan laut dangkal (zona neritik) berdasarkan dominasi foraminifera yang dikandungnya. Namun beberapa penelitian terdahulu menyatakan umur Formasi Jatiluhur yang bervariasi. Penelitian paleobatimetri berdasarkan kumpulan foraminifera kecil diharapkan dapat melengkapi kajian detil yang terkait dengan evolusi daerah ini selama Miosen. Pengambilan 30 sampel sedimen dilakukan secara sistematik pada satu lintasan di sepanjang Sungai Cileungsi. Hasil preparasi sampel sedimen dengan metode hidrogen peroksida menghasilkan 57301 individu foraminifera kecil yang terdiri dari 23276 individu foraminifera plangtonik dan 34025 foraminifera bentonik. Untuk mengetahui paleobatimetri, digunakan rasio foraminifera plangtonik dan foraminifera bentonik kecil. Hasil Rasio P/B berkisar antara 4,4 % - 74,0 % menunjukkan paleobatimetri Formasi Jatiluhur berkisar antara zona neritik dalam – zona batial atas.Jatiluhur Formation in the area of Cileungsi River was a shallow marine environment based on the foraminiferas domination. Several previous published papers had suggested age variation of the Jatiluhur Formation. Paleobatimetry study based on small foraminiferas was expected to complete the Miocene evolution analysis of the region. Thirty sediment samples were picked systematically in a section line along Cileungsi River. The hydrogen peroxide preparation of sediment samples produced 57301 small foraminifera. There were 23276 planktonic foraminiferas and 34025 benthic foraminiferas. To understand the paleobathimetry of this research area, we calculated the ratio of planktonic foraminifera and benthic foraminifera (P/B ratio). The P/B ratio is betweeen 4,4% and 74,0%. The ratio suggests that the paleobathimetry of Jatiluhur Formation is Inner Neritic Zone - Upper Bathyal Zone.

BIOFASIES DAN EKOLOGI PERAIRAN JAWA TENGAH BAGIAN UTARA BERDASARKAN KUMPULAN FORAMINIFERA BENTIK KECIL Lia Jurnaliah; Ildrem Syafri; Adjat Sudradjat; Roebyanto Kapid
JURNAL GEOLOGI KELAUTAN Vol 17, No 2 (2019)
Publisher : Pusat Penelitian dan Pengembangan Geologi Kelautan

Daerah penelitian merupakan bagian dari Laut Jawa terletak di Perairan Jawa Tengah bagian Utara. Laut Jawa dibatasi oleh tiga pulau besar sehingga kondisi Laut Jawa menjadi tertekan karena memperoleh kontribusi air dan sedimen dari ketiga pulau tersebut. Tujuan dari penelitian ini adalah untuk menentukan biofasies dan kondisi ekologi dari daerah penelitian berdasarkan kumpulan foraminifera bentik kecil. Foraminifera bentik kecil adalah hewan laut uniseluler bercangkang yang hidup di atas atau di dalam sedimen dasar laut. Kehidupannya sangat dipengaruhi oleh lingkungan sehingga foraminifera dapat digunakan sebagai indikator lingkungan. Analisis kuantitatif dilakukan pada 32 sampel sedimen dengan cara mengumpulkan data foraminifera bentik kecil berukuran 0,125 mm pada setiap satu gram sampel sedimen kering. Berdasarkan analisis kluster, daerah penelitian terbagi menjadi 4 biofasies yaitu Biofasies I (Zona Litoral-Zona Paparan dalam), Biofasies IIa (Zona Paparan dalam), Biofasies IIb (Zona Litoral-Zona Paparan dalam) dan Biofasies III (Zona Paparan dalam). Selanjutnya, nilai indeks diversitas dari keempat biofasies tersebut berkisar antara 0,7 – 1,1. Keempat biofasies dan nilai indeks diversitas menunjukkan daerah penelitian merupakan lingkungan laut dangkal dengan tekanan ekologis sedang sampai tinggi.Kata Kunci: foraminifera bentik kecil, biofasies, indeks diversitas, laut dangkal, ekologi, Perairan Jawa Tengah bagian Utara. The research area is part of the Java Sea located in the northern part of Central Java. Java Sea is surrounded by three large islands. Therefore, its condition becomes depressed because of the contribution of water and the sediment from the three islands. The purpose of the study is to determine the biofacies and ecological conditions of the research area based on small benthic foraminifera assemblages. The small benthic foraminifera are unicellular sea shell animals that live on or within the sediment of the seabed. Its life is severely influenced by the environment so that the foraminifera can be used as environmental indicators. Quantitative analysis was carried out on 32 sedimentary samples by collecting of 0.125 mm benthic foraminifera on each one gram of dried samples. Based on the cluster analysis, the research area is divided into 4 biofacies i.e. Biofacies I (Littoral Zone-Inner Shelf Zone), Biofasies IIa (Inner Shelf Zone), Biofacies IIb (Littoral Zone-Inner Shelf Zone) and Biofacies III (Inner Shelf Zone). Furthermore, the range diversity index value of all biofacies is 0. 7 – 1.1. It can be concluded that the all biofacies and diversity index value shows the research area is shallow sea with medium stress to highly stress ecology.Key words: small benthic foraminifera, biofacies, diversity index, shallow sea, ecology, northern Central Jawa waters

PB RATIO ANALYSIS OF FORAMINIFERA TO OBSERVE PALEOCEANOGRAPHIC CHANGES DURING HOLOCENE IN ARAFURA SEA Swasty Aninda Piranti; Luli Gustiantini; Shaska R. Zulivandama; Catur Purwanto; Lia Jurnaliah; Budi Muljana; Rina Zuraida; Sangmin Hyun
BULLETIN OF THE MARINE GEOLOGY Vol 37, No 1 (2022)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.37.1.2022.771

Arafura Sea is influenced by several climatic dynamics, it is also a part of the coral triangle that provides most of marine organism diversity of the world. Therefore, this area is an important waters that impact the climatic dynamic so its paleoceanographic changes need to be understood. For that, we analyzed the foraminiferal PB ratio from marine sediment core ARAFURA-24 with a core length of 179 cm, collected from 47.4 m water depth, combined with that of Aru-07, taken from 276 m water depth (core length 152 cm). Both sediment cores were collected from the Arafura Sea using a gravity corer on board Geomarin III. ARAFURA-24 was sub-sampling in every 20 cm interval, while Aru-07 had been prepared in every 10 cm interval. PB Ratio values from ARAFURA-24 and Aru-07 ranged from 0,56% - 7,43% and from 29,89% to 82,66%, respectively. The age model was reconstructed by 14C radiocarbon dating derived from organic sediment, combined with tie points of PB ratio records. The result indicates that ARAFURA-24 has been sedimented since the last 9.7 kyr BP. PB ratio records reveal three maximum sea level rises, which are before 7.4 kyr BP, at 5.86 kyr, and after 3 kyr BP (approximately at 2 kyr BP at Aru-07). From the age model reconstruction, sedimentation during the last 3 kyr BP was relatively slower than that in the older period. It can be concluded that the foraminiferal PB ratio during Late Holocene was not significantly impacted by sedimentation rate (hence detrital influence), in contrast, during Mid-Holocene detrital influence had more impact on the PB ratio record.

KELIMPAHAN FORAMINIFERA BENTONIK KECIL DAERAH CISANGKAL, KECAMATAN LANGKAPLANCAR, KABUPATEN PANGANDARAN, PROVINSI JAWA BARAT Rumsih, .; Jurnaliah, Lia; Winantris, .
Bulletin of Scientific Contribution Vol 22, No 1 (2024): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v22i1.50205

Daerah penelitian secara administratif berada di Kampung Cisangkal, Desa Bangunkarya, Kecamatan Langkaplancar, Kabupaten Pangandaran, Jawa Barat. Secara geografis terletak pada koordinat 108°30’41,61’’ BT dan 7°36’17,10’’ LS sampai 108°30’40,48’’ BT dan 7°36’19,78’’. Penelitian ini bertujuan untuk mengetahui kelimpahan foraminifera bentonik kecil di Kampung Cisangkal. Metode yang digunakan dalam penelitian ini meliputi pengambilan data lapangan dengan metode acak pada 2 stasiun, kemudian preparasi foraminifera kecil, dan analisis kuantitatif dengan menghitung setiap individu dan genus dari semua sampel. Sampel yang digunakan sebanyak 9 sampel batuan. Berdasarkan hasil penelitian kelimpahan foraminifera bentonik kecil pada daerah penelitian terdiri dari 1.059 individu foraminifera bentonik kecil dengan 38 genus. Kelimpahan tertinggi berada pada sampel ST2-H1 dengan jumlah 266 individu dan 24 genus. Sedangkan kelimpahan terendah berada pada sampel ST1-H7 dengan jumlah 17 individu dan 5 genus. Adanya perbedaan keragaman genus dan jumlah individu menunjukkan terjadinya perubahan lingkungan. Kata Kunci: Foraminifera bentonik kecil, Cisangkal, Kelimpahan, keragaman.

PRELIMINARY STUDI KELIMPAHAN MIKROFAUNA DAN POLEN DI TELUK CILETUH, KAWASAN GEOPARK CILETUH, SUKABUMI Fauzielly, Lili; Jurnaliah, Lia; Winantris, .; Fitriany, Ria; Rosana, Mega Fatimah
Bulletin of Scientific Contribution Vol 22, No 2 (2024): Bulletin of Scientific Contribution:GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v22i2.56710

Sebanyak 31 sampel sedimen dari Teluk Ciletuh telah digunakan untuk studi mikrofauna dan polen. Pengambilan sampel permukaan menggunakan metoda shallow coring untuk analisis polen dan grab untuk mikrofosil. Penelitian ini bertujuan untuk mengetahui distribusi spasial mikrofauna dan polen di daerah konservasi kawasan Geopark Ciletuh.Pengambilan sampel sedimen dilakukan pada bagian barat dan timur dari muara Sungai Palangpang. Secara umum, kondisi perairan di bagian barat dari muara sungai terlihat lebih jernih daripada perairan sebelah timur. Sedimen pantai di sebelah timur menunjukkan penghalusan ke arah barat, terdiri atas sedimen berupa pasir sangat kasar-sangat halus dengan kandungan pecahan fragmen cangkang bivalvia yang dominan, ke arah pantai berkembang kawasan mangrove yang dikembangkan oleh komunitas masyarakat setempat. di bagian barat dari muara sungai, sedimen berupa pasir sedang hingga lempung, dan ke arah pantai, endapan berupa pasir sedang yang bercampur dengan tanah.Hasil identifikasi dari 25 sampel sedimen yang diambil dari Teluk Ciletuh menunjukkan hanya 19 sampel yang mengandung mikrofauna. Identifikasi mikrofauna dilakukan secara kuantitatif dengan menghitung jumlah individu per 1 gram sampel sedimen kering. Terdapat 5135 individu mikrofauna, dengan kelimpahan secara berurutan adalah dari kelompok foraminifera bentonik (82,07%), foraminifera planktonik (5,84%), spikula (4,55%) dan kelompok non foraminifera (7,53%).Dari kawasan mangrove yang berada di pantai Cikadal, analisis polen terhadap 6 sampel sedimen permukaan diperoleh polen asal lingkungan mangrove, polen freshwater, terrestrial dan polen dari pegunungan.

Ostrakoda Formasi Bentang-Formasi Koleberes Cimaragang, Cianjur, Jawa Barat Nugraha, Cahya; Lili Fauzielly; Lia Jurnaliah
Jurnal Geologi dan Sumberdaya Mineral Vol. 25 No. 3 (2024): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v25i3.878

Abstrak-Keberadaan fosil ostrakoda pada Formasi Bentang dan Formasi Koleberes, tidak pernah muncul untuk dijadikan acuan karakteristik kedua satuan batuan tersebut. Ostrakoda memiliki tingkat adaptasi tinggi terhadap lingkungan, sehingga dapat digunakan untuk interpretasi lingkungan pengendapan. Berdasarkan bukti penelitian dan catatan peneliti terdahulu, terungkap bahwa daerah penelitian dipengaruhi oleh aktivitas vulkanik. Hal ini menyebabkan pengawetan fosil ostrakoda kurang baik, fosil ostrakoda ditemukan dalam bentuk karapas teraglutinasi, sehingga determinasi fosil ostrakoda hanya dapat dilakukan sampai tingkat genus. Sebanyak 13 genus dengan total 900 specimen ostrakoda yang berasal dari 10 family antara lain: Trachyleberididae, Xestoleberididae, Leptocytheridae, Thaerocytheridae, Cytherideidae, Cushmanideadidae, Bythocyprididae, Cytheromatidae, Philomedidae, dan Bythocytheridae, dapat diidentifikasi dari 13 contoh batuan. Indeks diversitas ostrakoda daerah penelitian tergolong diversitas rendah - sedang. Genus ostrakoda yang melimpah pada kala Miosen Tengah hingga Pliosen Awal yakni Lankacythere yang termasuk dalam kumpulan ostracoda autochthonous dan Keijella, yang merupakan ostrakoda penciri lingkungan laut dangkal, paparan kontinen <100m dengan karakteristik laut tropis. Katakunci: Formasi Bentang, Formasi Koleberes, Lingkungan Pengendapan, Ostrakoda.

Evidence of Pliocene-Pleistocene Unconformity in eastern Bogor Trough, Sumedang-West Java Alam, Syaiful; Sendjadja, Yoga Andriana; Jurnaliah, Lia; Fachrudin, Kurnia Arfiansyah; Gani, Reza Mohammad Ganjar
Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v3i1.21528

AbstractRecent measuring stratigraphic observation in Cikandung River has revealed the Late Pliocene stratigraphic and tectonic event. Research area is located in easter Bogor Trough. Previously, it was stated controversially pertaining to the stratigraphic relationship between Kaliwangu and Citalang Formations. The outcrop-based remark has never been explained, slightly intuitive. Making strike and dip measurements and stratigraphic analysis using tape and compass traverse were done to unveil the role of Plio-Pleistocene tectonic regime in stratigraphic-filling of the basin. Strike azimuths recorded from several locations of Citalang and Kaliwangu Formations show angular geometry and both of those sedimentary facies within formations indicate the significant and rapid change in depositional process. But interestingly, the angular geometry is only founded in the southern part of study area. To the north, angular relationship becomes parallel. This geometrical distribution implies the strong influence of tectonic regime in Late Pliocene interval. The evidence from outcrops observation conclude the unconformity between Citalang and Kaliwangu Formations. Keywords: Stratigraphic unconformity, Citalang and Kaliwangu Formations, Plio Pleistocene Tectonic

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