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All Journal Bulletin of Scientific Contribution : Geology
A. Helman Hamdani, A. Helman
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Environmental Science

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DISTRIBUSI FORAMINIFERA BENTONIK SEDIMENPALEO TSUNAMI LETUSAN GUNUNG KRAKATAU BERDASARKAN DATA INTI BOR U-6 DI DAERAH UJUNGKULON BANTEN Fauzielly, Lili; Jurnaliah, Lia; Hamdani, A. Helman
Bulletin of Scientific Contribution Vol 12, No 2 (2014): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (725.642 KB) | DOI: 10.24198/bsc.v12i2.8368

Abstract

The presence of microfossils in sediments on mainland can explain the phenomenon of paleo –tsunami. Foraminifera bentonik as indicators of depositional environment used in this study. The purpose of this study was to determine the distribution of depositional environments of sedimentary origin eruption of Mount Krakatau tsunami . According this study, tsunami sediments can be recognized begin depth 90 -120cm . From Mikropaleontologi quantitative analysis from 12 samples of sediment,was obtained of 2635 individual and 55 species of foraminifera bentonik . The dominant species is Streblus becarii Linnaeus , Planulina wuellerstorfi Schwager , Bulimina marginata d' Orbigny , Bolivina spathulata Williamson , Elphidium lessonii d' Orbigny , Euuvigerina peregrina Cushman. Depositional environment of origin of tsunami sediments is shelf –bathyal and inner –shelf lagoon.
ANALISIS LINGKUNGAN PENGENDAPAN BATUGAMPING BERDASARKAN DISTRIBUSI UNSUR KIMIA DI DAERAH CIDORA, KECAMATAN AJIBARANG, KABUPATEN BANYUMAS , JAWA TENGAH Fauzielly, Lili; Hamdani, A. Helman
Bulletin of Scientific Contribution Vol 13, No 3 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (579.261 KB) | DOI: 10.24198/bsc.v13i3.8407

Abstract

Studies on the distribution of chemical elements Lawangdora limestone area has been conducted to determine the depositional environment is based on the chemical characteristics . The purpose of this study was to apply the theory of Chilingar who stating that Mg levels will decrease when deposited away from the beach. The results showed that the study area is dominated by calcite limestone, and the type is low magnesium calcite . This is a type of calcite carbonate in deep marine sediments. Based on the cross section of the direction and distance relative to the content of the element magnesium ( Mg ) is seen that the direction of deepening moves relative to the north.
Co-Authors Lia Jurnaliah Lili Fauzielly