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Sanjoto, Siwi
LPPM IST AKPRIND Yogyakarta
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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ZONASI FORAMINIFERA PLANKTONIK DAERAH GUNUNG KINJENG DAN GUNUNG GEDE KECAMATAN SENTOLO KABUPATEN KULON PROGO DAERAH ISTIMEWA YOGYAKARTA Sanjoto, Siwi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (125.381 KB) | DOI: 10.34151/technoscientia.v2i2.452

Abstract

Stratigraphic analizes for samples from the Sentolo Formation is marl and carbo-naceous sandstone on Gunung Gede and Gunung Kinjeng, were examined for foramini-feral occurence. About fourty eight species of microplanktonic and twenty seven species of microbenthonic were identified. They have been studied previously in this three family Globigerinidae, Globorotalidae, Hantkenidae. This family clasificasied from one super fa-mily Globigerinacea. The analizes species of microplanktonic fosils have been correlated with N-9 Gunung Gede samples, and Gunung Kinjeng samples N12-N14 (Middle Mio-sen). The microbenthonic fosils have been identified that which depositional environment of the Sentolo Formation was Upper Bathyal.
AKTIVITAS VULKANISME EKSPLOSIF PENGHASIL FORMASI SEMILIR BAGIAN BAWAH DI DAERAH JETIS IMOGIRI Mulyaningsih, Sri; Husadani, Y T; Umboro, P A; Sanjoto, Siwi; Purnamawati, Dwi Indah
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2186.868 KB) | DOI: 10.34151/technoscientia.v4i1.489

Abstract

The widely exposed of volcanic rocks within western part of Central Java-DIY Southern Mountain areas, indicates that volcanic activities had influenced geology of this area. Volcanic-stratigraphic study finds pumiceus rocks, tuff and co-ignimbrite breccias that can be described as primery volcanic rocks at study areas. Those volcanic rocks were erupted explosively followed by collapsing strato cone and forming new caldera. The associate of volcanic rocks with co-ignimbrite breccias, indicates that the central eruption was not far from the outcropes. Shallow intrusive rocks of andecites bearing hornblendes that exposed at the highest cone shape geomorphology of Gunung Gede, south to southwest Sudimoro, might be as the central eruptions.
Co-Authors Dwi Indah Purnamawati, Dwi Indah Husadani, Y T Sri Mulyaningsih Umboro, P A