Pumice flow of the 1883 Krakatau eruption occurs It at Small Rakata, Rakata and Sertung Islands, those which roughly correspond to the wall of Krakatau caldera, Indonesia. significantly differs in both mineral and chemical compositions against any other volcanic rock or ejecta of the Krakatau Group, those of which belong to Miyashiro's (1974) tholeiitic series. Meanwhile, lithic fragments of gr…
Geochemical and lithological studies of volcanic rocks, decta and pyroclastic flows, those of which were collected from Phenocrystic minerals from the Krakatau Group, were carried out. The volcanic rocks were also investigated by the electron-probe Thermally altered products and related minerals, icroanalyzer. And pyroclastic flow and pumice were examined by X-ray powder iffraction method and t…
De Talamau is een 2912. 3 m hooge samengestelde vulkaan in het noordelijke van Sumatra's Westkust, die volgens Kemmerling (1921p.7) een terrein van 350 km2 met zijn vulkanisch produkten bedekt.
De vorm van het eiland is slechts weinig veranderd.
Het is zeer waarschijnlijk, dst de eerst 3 km, verder benedenwaarts 1 km breede bres door instorting ontstaan is, waarbij de puinmasse zich in het voorland verspreidde.
Sehubungan dengan akan diadakannya simposium peringatan satu abad meletusnya gunung Krakatau, dan sesuat dengan rencana kerja Bagian Froyok Pemetaan Topografi Gunungapă tahun 1983/1984, maka diadakan pangukuran situasi gunung Anak Krakatau yang baru. Karena pota hasil pengukuran yang lama (1981) telah mengaland perubahan akibat adanya letusan pada tahun 1982. saya ditugaskan Kasi Pemetaan T…
Menanggapi berita Harian Sinar Indonesia Baru terbitan tanggal 22 Oktober 1983 dan berita pener- bitan tanggal 26 Oktober 1983 mengenai terjadinya gempabumi di Berastagi dan desa Rajaberneh di Kabupa ten Karo, maka pimpinan Kanwil Departemen Pertambangan Dan Energi Propinsi Sumatera Utara segera mem berangkatkan penulis ke lapangan untuk mengadakan pe meriksaan sepenuhnya keadaan gunungapi ters…
It is, indeed, both a pleasure and a privilege for me to welcome you on behalf of the Indonesian Governement and of the Indonesian Institute of Sciences (LIPI) at the Opening Ceremony of the Symposium on the 100th Vear Development of Mt. Krakatau and its Surroundings. LIPI is most happy to have you all with us today, since by your very presence you have also honoured us at LIPI's sixteenth anni…
The post-meeting trips arranged for a guided by VSI sci- entists were a great success, and at the outset I'd like to convey the thanks from my colleagues, and from myself, for extending this considerable hospitality and courtesy to us. Each and every one of the participants: Fiske, Simkin, Stoiber, Williams, Glicken, Yokoyama, Punongbayan the Banks, Rosengren, and of course Mary Ann and I, were…
Krakatau catastrophic eruption in 1883 produced a large amount of pumice in the form of pyroclastic flow or fall. At present, they are on Rakata, Sertung, Panjang, and Sebesi islands. The pumice as the major constituent, often accompanied by obsidian is petrographically and chemically analysed. Most pumice was white with some pink and blackish grey; in various from ash, sand lapilli to block. M…