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.
Naar aanleiding van het schrijven van den kontroleur van takengeun, den heer w.
De verhoogde werking van den Dempo in de eerste vier maar maandenvan 1934 bestaande uit asch- en moddererupties en het verzoek van de Koloniale Bank een plaatselijk onderzoek naar den toestand van den vulkaan en het gevaar, dat eventueel voor ondernemingen dezer maatschappij te duchen valt, was aanleiding, dat deze vulkaan in de eerste helft juni door steller dezes nader onderzocht werd.
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…
In Anak Krakatau's fifty years of existence an evolutionary developmental growth of its geomorphology and a gradually changing silica-content in the effusive throughout its five decades of eruptive activity could be recognied (De Neve, 1980, 1981).
A program to carry out a series of integrated research activities on Mount Krakatau and the surrounding area has been drawn up and circulated to relevant parties by the Indonesian is planned to span for two years, beginning in Augst 1981.
Krakatau was studied from September 10 - 12. The 1883 eruption produced a large non - walded ignimbrite deposit (ash - flow) which covers large areas of Rakata, Sertung and Rakata Islands. We landed on all three islands at accesible points and axamined coastal exposures of the 1883 deposit.
Sesuai rencana kerja proyek pemetaan geologi Gunungapi Sub-Direktorat Pemetaan Gunungapi Direktorat Vulkanologi pada PELITA III geologi gunungapi Krakatau. Pekerjaan lapangan berlangsung 40 hari dari 13 Maret sampai dengan 21 April 1982.