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All Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Bulletin of Geology
Winantris Winantris
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Chemistry Earth & Planetary Sciences Energy Engineering

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Perubahan Iklim Danau Bandung Purba Berdasarkan Analisis Palinologi, Daerah Cihideung, Lembang, Jawa Barat Rizki Satria Rachman; Winantris Winantris; Budi Muljana; Nana Sulaksana
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 1 (2020): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i1.404

Abstract

IClimate is the prevailing weather condition of an area throughout the year. Climate affects the vegetation in a region. The research aimed to study the climate and humidity change during the Holocene in Bandung Paleo-Lake based on palynomorph analysis. The twenty-four samples were taken using hand drill in 172.5 - 52.5 cm depth, continued with preparation and determination. In this study, descriptive analysis and comparison between pollen, spores and their sediments to show the climate and humidity change in Bandung Paleo-Lake. The results show that the samples which were taken on peat deposits showing four times climate changes in five zones, which characterized by montane forest pollens, i.e. Podocarpaceae and Pinaceae, lowland forest pollen i.e. Commelinaceae, Moraceae, spores from the Family Polypodiaceae, Pteridaceae and Dennstaedtiaceae, and Gramineae at the study area.Keywords: Climate, palaeo, analysis, palinology, Bandung Lake.
Dryobalanoxylon sp. : Silicified Fossil Wood from Lebak Regency, Banten Province, Indonesia Hanny Oktariani; Winantris winantris; Amir Hamzah
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 2 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i2.459

Abstract

Abstract- Two fossil wood were discovered from  Sindangsari Village, Sajira District, Lebak Regency, Banten Province, Indonesia. They were preserved within tuffaceous rocks of the Genteng Formation in Early Pliocene age in littoral to terrestrial environment deposition. To identify mineral composition of the silicified wood, XRD analyser method was applied. Result of XRD analyses shows that both of fossil wood are Dryobalanoxylon sp. consist of quartz mineral with d value is 3.358 Å and 3.350 Å Keywords : Dryobalanoxylon, Early Pliocene, Genteng Formation, Quartz
FOSIL KAYU Dryobalanoxylon sp. PADA FORMASI GENTENG DI KABUPATEN LEBAK PROVINSI BANTEN DAN PALEOFITOGEOGRAFINYA DI INDONESIA Hanny Oktariani; Winantris Winantris; Lili Fauzielly
Bulletin of Geology Vol 2 No 1 (2018): Bulletin of Geology
Publisher : Fakultas Ilmu dan Teknologi Kebumian (FITB), Institut Teknologi Bandung (ITB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/bull.geol.2018.2.1.5

Abstract

Fosil kayu ditemukan di Desa Sindangsari, Kecamatan Sajira, Kabupaten Lebak, Provinsi Banten. Fosil kayu terawetkan pada batuan tufa, formasi Genteng yang berumur Pliosen Awal dengan lingkungan pengendapan terestrial. Untuk mengetahui jenis fosil kayu dilakukan pengamatan anatomi dengan cara membuat preparat dari 3 bidang yaitu lintang, radial dan tangensial. Pembuatan preparat fosil kayu sama seperti pembuatan preparat sayatan tipis pada batuan. Hasil pengamatan anatomi pada fosil tersebut menunjukkan ciri : sel pembuluh baur, hampir seluruhnya soliter, dengan frekuensi pembuluh 4 - 8 per mm2, trakeid vaskisentrik, terdapat tilosis, lebar jari-jari 1-3 seri, lebar jari-jari besar 4 - 10 seri, saluran interseluler aksial dalam baris tangensial panjang dengan ukuran lebih kecil dari pembuluh. Ciri tersebut memiliki kesamaan dengan Famili Dipterocarpaceae, Genus Dryobalanoxylon. Dryobalanoxylon tercatat ditemukan di Indonesia sejak Miosen - Plistosen di Sumatera, Jawa dan Kalimantan.
Co-Authors Amir Hamzah Budi Muljana Hanny Oktariani Hanny Oktariani Lili Fauzielly Nana Sulaksana Rizki Satria Rachman