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FORAMINIFERA SEBAGAI PENCIRI PALEO ENVIRONMENT: STUDI KASUS PADA LINTASAN KALI BENTUR, NGAWENAN, BLORA -, Lili Fauzielly
Bulletin of Scientific Contribution Vol 6, No 1 (2008): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (662.454 KB) | DOI: 10.24198/bsc.v6i1.8155

Abstract

Foraminifera analysis taken from 18 surface sample from sandstone unit and siltstone unit, Kali Bentur section, Ngawenan area, Blora.According quantitative analysis, foraminifera assemblages consist of 39 species (218.128 individu) planktonic and 53 species (16.384 individu) bentic , with abundance of Globigerinoides trilobus imaturus, Globigerinoides trilobus trilobus, Globoquadrina altispira, Globoquadrina dehiscens, Orbulina universa, Globorotalia menardii and Bolivina, Batisiphon, Cibicides, Robulus, Planulina, Uvigerina dan StilostomelaForaminifera planktonic distribution indicated tropical zone, warm water(24oC - 28oC ) salinity 34-36 ppm, and based on bentic foraminifera, there were paleoenvironment change that more deep from sandstone unit to silt unit.
DISTRIBUSI VERTIKAL OSTRACODA DAN HUBUNGANNYA DENGAN PERUBAHAN LINGKUNGAN DI PERAIRAN TELUK JAKARTA -, Lili Fauzielly
Bulletin of Scientific Contribution Vol 11, No 2 (2013): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1044.085 KB) | DOI: 10.24198/bsc.v11i2.8292

Abstract

A vertical distributions from quantitative analysis of ostracods and Total Organic carbon (TOC) was recorded from short sediment core from inner part of Jakarta Bay. A total of 56 ostracod species were obtained from 9 core samples. The dominant species were Keijella carriei and Loxoconcha wrighti, which are common in areas with high TOC and TN contents. According to analysis of ostracod assemblages and CNS analysis, the site began to be influenced by organic contamination from around 1950. Although the population of Jakarta City has increased rapidly since then, TOC and TN contents which were low, have gradually increased (0.58%–0.9%). The increased sedimentation rate after 1950 resulted in an increasing TOC ratio.