Locally, carbonate build-up also developed in the southern basin margin area.In the Rengasdengklok High/Seribu Shelf near the Northwest Java coastal area a series of thick reefal carbonates (Mid-Main carbonate) developed on a roughly N-S trending parallel to the regional basement fault blocks of the area. • Lateral displacement between blocks in Tertiary times is made by transcurrent faulting, components of large-scale strike-slip movement in response to the plate-convergence process itself. Indonesia. 1987) but much less is known about Tertiary magmatism. northwest. The Vera Sub-basin is a deep Mesozoic and Tertiary depression NE of Arjuna Sub-basin.
Based on groupings of radiometric ages (Bellon et al., 1990) and the stratigraphic occurrence of volcanic beds, the following phases can be recognized: 1. The upper part of the Ledok Formation is characterized by bioturbation and large cross bedding, indicating outer to inner neritic environments. I l, 12). Results of previous work in West Java suggest the occurrence of volcanic producs of Late Tertiary magmatic activity; for example Pertamina (1988) recorded a K-Ar age of 12.0+ 0.1 Ma from a calc-alkaline pyroxene-andesite lava which represents part of the basement of the Quaternary Wayang Volcano. Above the Kalibeng Formation were deposited Pucangan Formation, consists of Iaharic breccias at the lower part and black and bluish grey of clays with intercalation of thin layers of tuff, diatomae and molluscs beds, were deposited in the swamps, lake and shallow marine environments during Early Pleistocene. 4.2). These were deposited as turbidites. Its onshore prolongation is known as the Tangerang High, which is separated from the Ciputat Sub-basin by a major NNW-SSE trending fault.The Bayah and Honje Highs are Tertiary structural highs located on the south coast of West Java, Indonesia, situated at the margin of the Malingping Low, the western extension of the Bogor Trough (Fig. (1995) show four depositional cycles within the Tertiary sediments of this area: a Late Oligocene-Early Miocene extensional phase, followed by Early Miocene basin subsidence, a Middle Miocene extentional phase, and Upper Miocene-Pliocene basin subsidence (Fig. TWT) which consists of Baturaja and mostly post-Baturaja sediments, located in the north of the Banten Block.
"northwest" bahasa Indonesia terjemahan. al., 1995).
Book Now. The Pelang Formation there consists of 125 m. of alternating massive to bedded fossiliferous gray marls and gray claystones with intercalations of bioclastic limestones.
4.8). This melange of low-grade meta-sedimentary, igneous, and meta-igneous rocks is the result of subduction-related accretionary processes associated with the Meratus Suture (Fig. 4.8).1. The fluviatile sandstones and shales facies which onlap the alluvial fan facies. Search the world's information, including webpages, images, videos and more. 4. 5-9). These correlate with the Bulu Formation, which mainly consists of bedded grainstone and wackstone, and the lower part of the Wonocolo Formation, composed of interbedded fossiliferous sandy marl and thin bedded gray fossilliferous calcarenites. Reefal carbonates grew on basement highs (i.e. Among the depressions the central offshore basin with its extension onshore (the Kebumen basin) and the depression of Yogyakarta appear to have been persistently deep. The Neogene sedimentary sequence dips gently to the south.