Leo, G.W., Hedge, C.E. and Marvin, R.F., 1980. Geochemistry, strontium isotope data, and potassium-argon ages of the andesite-rhyolite association in the Padang area, West Sumatra. J. Volcanol. Geotherm. Res., 7: 139-156.
Quaternary volcanoes in the Padang area on the west coast of Sumatra have produced two-pyroxene, calc-alkaline ande…
The Tertiary volcano-plutonic arc exposed along the west coast of Sumatra can be traced to the south coast of Java. The corresponding subduction zone can be found in the islands west of Sumatra and the submarine ridge south of Java.
The Late Cretaceous plutonic belt of Sumatra does not continue to Java but passes north of it,…
Katili, J .A., i 973. Geochronology of West Indonesia and its implicatioti on plate tectonics: .Tectono:.physics, 19: 195-212. The results of radiometric dating of granitic rocks around Kotanopan near the west coastof-Ce0ntr~l umatra indicate an average age of 45 million years.
Granites from the Lissi Mass in t…
Paleomagnetic studies of lams from the island of Hawaii have established the following: (1) All lavas now exposed on the island are less than 1 million years old (Pleisto• cene). (2) The present absence of nondipole field components in the central Pacific ar…
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By increasing the stress tending to compact the un• consolidated deposits by as much as 50 percent, man has created the world's largest area of intense land subsid• ence in the west-central San Joaquin 'Valley. With• drawal of ground water for agriculture has caused more than 2,000 square miles to subside …
Bahan galian sebagai salah satu sumber daya alam adalah merupakan modal -dasar pembangunan yang pemanfaatannya harus -usahakan agar tidak merusak tata lingkungan h i dup manusia engan memperhatikan faktor-faktor yang merupakan komponen ingkungan hidup. srategi Pembangunan di •Indonesia sebagaimana …
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65 halaman, daftar tabel, daftar foto, daftar gamb
Batuan kersikan merupakan batuan tertua(Permokarbon1yang terd pat di daerah Indarung. Formasi batuan ini telah mengaLami pelipatan yang kuat dengan ketebalan ratusa.n meter. Diatas formasi ini tersesar …
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19 halaman ,tidak berwarna, lampiran peta, cover b
•our.ing a c;eoloc;ical or g e o ch c s.Lc a L uu r v o y it. i[; r,ocsi ble to collect u wide vnricty and large quantity of relevant data. For the efficient interprqtation of these data it ia e~scntial to have a uniform su s t em …