Bahan galian industri adalah mineral industri dan batuan, yaitu semua bahan galian di luar mineral logam dan radioaktif yang mempunyai kegunaan langsung untuk berbagai industri. Menurut undang-undang dan peraturan yang berlaku ten tang penggolongan bahan galian (PP No. 27/1980), maka sebagian besar bahan galian industri termasuk bahan galian Golongan C. Secara geologi bahan g…
Geodynamics, the study of global movements and of the forces driving them, is a rekatively fresh offshoot from the vigorously branching tree of the earth sciences. Before the advent of Alfred Wegener on this scene in the early nineteen-hundreds, the idea of permanency in the distribution of continents and oceans was almost sacrosanct.
Das Antlitz der Erde, or “The Face of the Earth”, was the title of the first great magnum opus on the gross surface features of the earth by Eduard Suess late last century. A recent British television documentary with the same purpose bore the same title.
Batumulia dapat digolongkan dalam tiga bagian yakni; jenis batu permata (precious stones), setengah batu permata (semi precious stones ), dan jenis batu hias ( ornamental stones). Batumulia jenis batu permata adalah mineral yang mempunyai daya tarik yang terdapat di alam dan setelah dilakukan pemrosesan maka keindahannya semakin bertambah dari bentuk asalnya.Pada umumnya jenis batu permata …
rectangular area of 72,000 ha along the tidal reach of the Batanghari River, northeast of Jambi, Sumatra, has been proposed by the Indonesian government as one of the sites for developing a community to relieve the population pressure in other parts of Indonesia (see figure l). By year 2000, Hanson and Koesoebiono (1975) estimated that a population of perhaps 250 million people would requir…
The impetus for publishing this set of articles was the realization that, year after year. I and my students at Stanford were making copies (with varying degrees of legibility and legality) of the same classic articles on plate tectonics and geomagnetic reversals. At first we did this because there was so little material on the subject available.
The wavefields generated by strombolion activity are investigated using data from small-aperture (120-600 m) seismic arrays deployed on the north flank of Stromboli and data from seismic and pressure transducers set up near the summit crater.
lmu Petrografi batubara sebetulnya telah dipelajaari sejak awal abad ke 20 yang dipelopori oleh Marie Stopes, (1919) dan Reinhardt Thiessen, (1920). Kedua nama ini telah memperkenalkan terminologi dan klasifikasi batubara yang sampai saat ini masih terpakai. Namun penclitian batubara secara petrografi baru dimulai sejak tahun 1930-an, dimana Marie Stopes, (1930) memp…
Volcanism is one of nature’s primal spectacles. It commands our attention, whether for its awesome power, its danger, or its beauty. The years 1975-85 brought dramatic examples of volcanism – from the 1980 blasts of Mt. St. Helens, through the continuing lava river of Hawaii, to the tragic eruption of Colombia’s Nevado del Ruiz in 1985 and these have been abundantly documented by the news…
The tectonic concept known as seafloor spreading , global tectonics and also as plate tectonics began engulfing the geological community in the early sixties. Within less than a decade this unifying, geotectonic hypothesis beame widely known, and judging from the current literature, it has also been widely accepted.