This report which describes the geological setting and physical features of the most important coal deposits in Central Sumatra is based on detailed studies over 13 years by the Sub-Directorate of Coal and Peat Exploration, which is the most experienced and well equipped government coal exploration group in this country. The Sub-Directorate of Coal and Peat Exploration within the Directorate…
The statocone of Mt. Cemara Lawang is part of The Mt. Bromo-Tengger volcano complex, East Java, Indonesia. Mt. Cemara Lawang is comosed of a sequences of deposits, comprising the big feldspar lava, andesite lava, phreatomagmatic ash fall, phreatic, basalt lava, basaltic andesite lava, andesite lava, alternating layers of pyroclastic fall and flow and the brown ash fall deposits from the oldest …
The late Mesozoic and Cenozoic convergence between Europe and Africa led to the Alpine mountain belt. In this thesis we will focus on the Aegean segment of this belt.
The Chalk Group accumulated during a 40 million-year episode of the Earth's history (100-61 Ma BP) during which intense volcanic activity at oceanic spreading ridges coincided with globally high sea levels, high sea-surface temperatures and a peak in coincided with globally high sea levels, high sea-surface temperatures and a peak in the production of organic matter.
The Ijen caldera complex is located in an active tectonic region, where the Indian plate is now sliding approximately northward beneath Java at about 6-7 cm/yr. This study is in two parts, the firs is detailed field mapping and includes a geological map and stratigraphy, which form the basis for other work. The second concentrates on the post-caldera pyroclastic deposits.
A I'heure actuelle, I'Indonesie possede 129 volcans en activite. Ces derniers se succendent depuis I'ile de Sumatra jusqu'aux Celebes et a la mer de Banda.
The Idjen caldera is classed as a Krakatoa type or stratocone caldera and is characterized by a caldera floor, a caldera escarpment, and older volcanic forms. The caldera diameter rangers from 14 by 16 km at the rim to 11 14 km at the floor with a maximum depth of 709m.
Sedimentary basins are well studied topic in geology, much is known about the setting in which they form, and the different type of basing fills. Less is know about basin early on in Earth history, particularly in the early Archens.
This study was part of a cooperative project with the Indonesian Institute of Sciences, Bandung, Java, the Michigan Technological University group (W.I Rose, Jr., principle investigator) and the Hawaii Institute of Geophysics, University of Hawaii group (G.P.L. Walker, principle investigator).
Today's continental shelves, such as the one covered by the North Sea, are products of the last post-glacial sea-level rise of the glacial era that began in the Late Pliocene and continued until today. The sedimentary history of shelf seas reflects the changing relationship between tectonic subsidence, sea level oscillations and (hydro-) dynamics processes.