Oleh: Deddy M. Barmawidjaja

Abstraksi : The vertical distribution of benthic foraminifera at a single sample station in the northern Adriatic Sea has been determined several times between December 1988 and November 1989. Quantitative data on specimens stained by Rose Bengal indicate that the majority of the specimens live in the topmost ...

Oleh: Purtyasti Resiwati;John, W. Farrell;Tom R. Janecek;Jeff K. Weissel;John Peirce;Shipboard Party

Abstraksi : The late Neogene hemipelagic and pelagic sedimentary sequence from ODP Site 758 yielded a continuous accession of well preserved calcareous nannofossils. Twenty one potentially useful late Neogene biostratigraphic datums were recognized. The absolute ages of the nannofossil datum levels from 6.50 ...

Oleh: Sugeng Wijono

Abstraksi : Field works and laboratory analysis were conducted to study the sedimentary components, sedimentation processes, and paleoenvironment of the Quaternary deposits in Eromoko, Central Java. The field works consist of a geological mapping and measurement stratigraphy, while the laboratory works consist ...

Oleh: Sunarno Alloy;Bambang Kanika;M. Tambunan

Abstraksi : Daerah Malingping Jawa Barat Bagian Selatan, semula ditafsirkan sebagai suatu rendahan yang terpisahkan oleh ar normal dari tinggian Honje yang terletak disebelah baratnya, dikenal sebagai "West Malingping Low Wilayah yang mempunyai struktur rendahan diharapkan terendapkan sedimen klastik halus ...

Oleh: C. Danisword

Abstraksi : A study of the magnetic polarity in Sangiran area shows that normal and reversed polarity changes appear along the sections of Sangiran area. The GAUSS and MATUYAMA Epoch boundary (2.48 m.y) is situated right above the Balanus limestone. The normal polarity event in the MATUYAMA Epoch in the ...

Oleh: Nubrowi Tojo Yuwono

Abstraksi : Paciran Formationtakes form as massive or non bedded reef limestones. In western part of Rembang zone, this formation has inter- fingering relationship wih Bulu Formation (Middle Miocene age), Wonocolo and Lodok Formation (Pliocene age). In Tuban Area, this reef limestones unconformably overlie ...

Oleh: Barabang Prustistho

Abstraksi : The oldest rock dated in this study was taken from the bottom of the Tempur valley which gives 1.01 0.05 Ma. The lava flows at small hills in the northern part of the Muria Complex have ages between 0.95 Ma and 0.90 Mu. The volcanic neck which built recent summit has an age of 0.17 0.02 Ma. The ...

Oleh: P.A. Sumosusastro;D.A. Siregar;D. Arifin;C. Jouannic;Tatsuo Shibasaki

Abstraksi : Several indicators of a slightly higher Holocene sea-level, reaching about 1 meters above the present situation have been found along the coasts of Tuban area, East Jawa. They are corrals in growth position on the surface of rocky platform of Eastern Tuban Radiocarbon datings have provided ages of ...

Oleh: Lukman Effendi;Helfinalis

Abstraksi : Morphology of the bottom sea perpendicular to the shoreline of the north Citarum delta in November 1991. showed in convex and concave forms. The convex form as indicating of the accretion beach can be found at Bungin Beting Pakis, Belubuk, between Belubuk and Sunpan; between Bungin and Pakis. ...

Oleh: Sartono;B. Suprapto;K. Poncomoyono;L. Hendrobusono

Abstraksi : Disputes on the geology of Timor strated from the different views on how to interpret the chaotic rock complexes on the island, i.e. as lithostratigraphic or as tectonostratigraphic units. Timor is situated in an accretionary zone. Tectonic melange wedges formed by Laramic sectonization and ...

Oleh: Agus Guntur;Romina S. Himawan;Bona Situmorang

Abstraksi : The formation of the Paleogene Talawi graben which is located in the western part of the Ombilin Basin was controlled by the dextral strike slip movements of the surest-southeast Stangkal and Silungang faults The strike slip fault system that was active since the Late Cretaceous subsequently has ...

Oleh: Nana Djurhana;Dwiyatno Rumlan

Abstraksi : The Sumba Island, which lies within the Banda fore-arc of Eastern Indonesia, is a fragment of continental crust that has been trapped between the Banda volcanic-are and the accretionary prism. Seismic data suggests a structural continuity between the islands of Sumba and the northern part of Timor. ...

Oleh: J. Sopaheluwakan;K. Lintbout;H. Helmers;H.Permana

Abstraksi : Seram is situated on the northern end of the Banda Arc, a west facing tectonically active are in eastern Indonesia. Studies on the metamorphic rocks occurring in close association with dismembered ophiolites in west Seram provide clues on the nature of the metamorphism and more importantly, the ...

Oleh: Danny Hilman Natawidjaja

Abstraksi : Method of microtectonic analysis integrating structural analysis of a microscopic to an outcrop scale and in turn to a regional scale, mainly based on structural mapping and sketching is developed to provide a complete understanding of structural styles, mechanisms, slip- vector and sequence of ...

Oleh: Iskandar Zulkamain

Abstraksi : Chemical.compositions of rocks of the Donnersberg Intrusion are characterized by high Potassium content (up to more than 80 W). This unusual KO content is compensated by low values of Nazo and Ca0. Using correlations between concentration of these oxides with their normative corund (c) can be ...

Oleh: Suparto Siswowidjojo

Abstraksi : Lamongan volcano in East Java is surrounded by a densely populated area and has beside its main craters at the summit also 55 different eruption sites in its surrounding. Some of these have only produced lava basalt or resulted in cinder cones or there are also combination of both Craters of ...

Oleh: Dewi Sri S.;Mamad B.;S. Bronto

Abstraksi : Merapi volcano (+ 2968 m) is one of the most active stratovolcanoes in Indonesia by having eruption period 110 years The volcanic activity is typical Merapi type in which its eruption are mostly accompanied by avalanche-generated pyroclastic flows and at the final stage a new lava dome extrusion is ...

Oleh: Pudjo Asmoro

Abstraksi : Batur caldera is situated at 115019-155 26% and 8°11-8°18'S, on the island of Hali, Indonesia. It consists of two calderas, the inner caldera is 7 km in diameter and the outer one is 11-15 km in diameter. In the centre of the Batur caldera grows Batur volcano (1717m). Batur lake sits on the east ...

Oleh: Mawardi;Irianto

Abstraksi : Awu is an active volcano, located on the northwestern part of Sangir besar island, and the most recently eruption is in 1966, as an explosive magmatic eruption The Awu's lavas are predominantly basaltic andesite. They are porphyritic and pilotaxitic texture. Plagioclase (Ano-Anss) are abundant, ...

Oleh: Kuncoro Cahyo Aji

Abstraksi : The Goire Endemic is a specific case found at the volcanoes ranges e.g. in the Merapi volcanoes area especially along the Senowo river the Krinjing Village). The case may be affected by pyroclastic rock prior material from volcanoes eruption which consists, of heavy metal elements. The elements ...

Oleh: Agus Sumaryono;Hariyadi Djamal

Abstraksi : In order to understand the characteristics velocity and the other information concerning the place where landslide took place, it is necessary to install some landslide minoring instruments at the site of landslide and the surrounding area. The purpose of instrument installation is to get the data ...

Oleh: Suharyadi;Agus Medi H

Abstraksi : The Northers part of Yogyakarta region has developed very fast recently, with the consequence of increasing water consumption. Water demand is met by utilizing surface as well as groundwater by developing shallow or deep wells. The excessive use of groundwater has caused a drop of its level. The ...

Oleh: Masrur Siddik;Perbegin Ointing;Ruslan Girsang

Abstraksi : ...

Oleh: Helfinals;Lukman Effendi

Abstraksi : Geological mapping of coastal plain is important in interpreting andimentation environments, such a subtidal, intertidal salomarch and gully. This Geological map in a basic need for developing the coastal plain areas. A mapping technique based on Lithogenetic unit, known as Special Profile Type Map ...

Oleh: Eko Soebowo;Yugo Kumoro;Sudaryanto

Abstraksi : Indication of the geological hazard is one of the important data for regional planning In the region of Kepahiang and Muaruman, Rajanglehong have a several potential location for geological hazard, such as landslide, active fault and th The investigation data show that the locations that have high ...

Oleh: Suharyadi, Suparwoto;Sudiartono

Abstraksi : The studied area is located at the northern part of Pegunungan Seribu Pegunungan Seribu is composed entirely of karst limestone. There is no large scale surface drainage in the area, generally run off from the hill find it way to the lowest point locally where it disappears through a vertical shaft ...

Oleh: Herryal Zoelkarnaen Anwar

Abstraksi : Residual rods are formed by the in-situ weathering process of the parent rock without undergoing eration or transportation. The factors of climate and topography play an important role in determining the rate of weathering and the thickness of residual soils. The residual soils is mostly found in ...

Oleh: Bandono;Budi Brahmantyo

Abstraksi : Pembangunan berwawasan lingkungan memerlukan informasi cermat tentang proses-proses geomorfologi pada dan sekitar wilayah pembangunan. Pengenalan dini terhadap proses dan akibatnya dapat dijadikan dasar antisipasi dan optimasi dalam perencanaan, pembangunan maupun pengembangan suatu ...

Oleh: Joko Supriyanto;Sudaryanto

Abstraksi : The analysis, based on Landsat and Hader images scaled 1:250.000 of Bengkulu Province, give five thematic maps natural resources, which consist of geology, geomorphology, shallow groundwater potential distribution of geologic hazard potential, and landuse/landcover. The natural resources mapa ...

Oleh: Sampurno;Nainggolan F.;Tri Hatmarso

Abstraksi : In Southern Mountain, around Wonogiri area, Central Java, are found many andesite intrusions of Tertiary age, two of them namely are andesite intrusion of Songputri and Wonogiri. The Songpatri andesite intrusion showing fractures which are more intensive towards the surface; so with the ...

Oleh: Haryadi Permana;Eko Soebowo;Kamtono

Abstraksi : The proposed site for road trace Wamena Hahema lake Kuyawage which connect the western hinterland of Wamana and our objects in Habema lake around passes various natural morphology: consist of plains, hills and mountain with singe generally between 5-255, but may exceed 25% in certain areas. The ...

Oleh: Yan Hamidi B.;Sigit Tedjokusumo;Bambang Wibowo L.B

Abstraksi : Proyek Pusat Listrik Tenaga Air Tulis Jawa Tengah memiliki sebuah terowongan aliran bebas ( non pressure tunnel) bergaris ngah dalam 2,8 meter. Terowongan sepanjang 2.8 Km ini akan menembus seri batuan sedimen yang terdiri dari batupasir, serpih dan breksi. Untuk kepentingan perencanaan dan ...

Oleh: Didi Sulandi

Abstraksi : ...

Oleh: Surono;Mac Endharto;Andi Azis;Djudah Made Ali

Abstraksi : The late Triassic-Jurassic Meluha Formation is widespread in the Southeast Arm of Sulawesi. The formation is underlain by metamorphic basement and conformably overlain by limestone sequences of the Leon Formation. The formation mainly consists of litharenite with intercalations of mudstone, ...

Oleh: M. Badrudin;Sri Sumarti

Abstraksi : The Merapi 1992 activity has been observed by Volcano Observatory both visually and instrumentally since January 20 as effusive eruptions where magma moved to the surface to form a larvae dme. A Part of the lava dome is falling down ominously as glowing rockfalls on the west slope of the volcano. ...

Oleh: Subandriyo, M.Ch.;Supriyati D.A;Subarno;Sri Subandini

Abstraksi : Merapi is an andesitic strato-volcano (2965 m) located in Central Java, Indonesia. The eruption of the volcano was first seen on January 20, 1992 by showing incandescent rock avalanches, accompanied by several avalanche-generated pyroclastic flows, and the peak of activity took place on February 2, ...

Oleh: Deny Juanda P.;Nusa Kusuma

Abstraksi : Based on hydrology analysis, detail technical geological mapping, geoelectric soundings, corings, and test pits, the principle of geological parameters could be formulated quantitatively. These parameters control the single landslide with 15 meters of sliding surface depth in Beser Formation. Based ...