Tectonics and paleogeography of the Sunda and Banda Islands
Grant-in-Aid for international Scientific Research
|Allocation Type||Single-year Grants|
|Research Institution||University of Tsukuba|
SASHIDA Katsuo Institute of Geoscience, University of Tsukuba Associate Professor, 地球科学系, 助教授 (60134201)
HARJONO Hery Geodinamic Department, 主任研究員
SOPAHELUWAHA ヤニ R&D cebter for Geotechnology, 主任研究員
UENO Katsumi Institute of Geoscience, University of Tsukuba, 地球科学系, 講師 (90241786)
ADACHI Shuko Institute of Geoscience, University of Tsukuba, 地球科学系, 助手 (80182997)
SOPAHELUWAKAN Jan R & D Center for Geotechnology
|Project Period (FY)
Completed(Fiscal Year 1995)
|Budget Amount *help
¥4,300,000 (Direct Cost : ¥4,300,000)
Fiscal Year 1995 : ¥4,300,000 (Direct Cost : ¥4,300,000)
|Keywords||radiolaria / conodont / Gondwana / collision / accretion / Southeast Asia / Tethys ocean|
Although our laboratory works are still in progress, I will describe briefly the results of our investigation in Timor and Sumatra Islands in 1995.
We made geologic investigations at and along the logging roads from Soe to Kolbano, Soe to Tanjunmenu and Nikiniki to Boti. We discriminated both Upper Triassic and Lower Cretaceous radiorian faunas from fine calcareous sediments cropping our along these logging roads. Among the Lower Cretaceous radiolarian faunas, we recovered Non-Tethys type radiolarian fauna which has peculiar multisegmented Nasselarian radiolarians.
We collected red limestone samples which belong to the Pemian Maubisse Formation and contain abundant fossils such as corals, brachiopods, ammonites, trilobites and others.
Altemation of sandstone and shale is cropping out at the road side cliff near Swanae. This alternation yields large inoceramid bivalves, corals and radiolarians. Radiolarian fauna from this altemation is referable to the rep resentative ones in the Lower Cretaceous in Tethys regions.
We discriminated Carboniferous and Pemian fusulinds from Bukitkingi ad Padan detan in Sumatra lslands, respectively. These fusulinids faunas have Tethyan affinity.
Shallow reefal limestone containg corals, algae and stromatolites has been first discovered from the north coast of the Lake Toba, in Sumatra lslands.
Research Products (4results)