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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Asia
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Far East
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Lesser Sunda Islands
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Timor (1)
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Taiwan (1)
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Europe
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Alps (1)
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Southern Europe
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Italy
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Apennines
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Malay Archipelago
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Timor (1)
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Pacific Ocean
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South Pacific
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Southwest Pacific
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Banda Sea (2)
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West Pacific
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Banda Arc (1)
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Indonesian Seas
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Banda Sea (2)
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Southwest Pacific
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Banda Sea (2)
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South America
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Andes
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Central Andes (1)
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Venezuela
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Bocono Fault (1)
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Merida Venezuela (1)
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United States
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Texas
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Primary terms
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Asia
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Far East
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Lesser Sunda Islands
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Timor (1)
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Taiwan (1)
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Cenozoic
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Quaternary
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Holocene (1)
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upper Pleistocene
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upper Weichselian
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Europe
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faults (1)
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Pacific Ocean
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Banda Sea (2)
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Indonesian Seas
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Banda Sea (2)
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Permian
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varves (1)
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sediments (1)
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South America
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Andes
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Central Andes (1)
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Venezuela
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Bocono Fault (1)
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Merida Venezuela (1)
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tectonics (2)
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United States
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Delaware Basin (1)
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New Mexico (1)
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Texas
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West Texas (1)
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sedimentary rocks
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sedimentary rocks
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clastic rocks
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mudstone (1)
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shale (1)
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sedimentary structures
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sedimentary structures
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planar bedding structures
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varves (1)
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soft sediment deformation (1)
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sediments
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sediments (1)
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Geological development of the Timor Orogen
Abstract The Timor Orogen comprises the island of Timor, a narrow offshore area to the north and a wider offshore fold-and-thrust belt to the south. This orogen formed by jamming and subsequent collision of the Banda Sea subduction system by the Australian Plate. The BandaSeis seismic survey has revealed excellent images of the deep-water fold-and-thrust belt. Seismic interpretation of the dataset demonstrated structural and tectonic features not previously described, including regional geological features on the Australian continental crust and two regional NE–SW sinistral strike-slip faults, and a prominent Middle Permian palaeogeographical high (Timor Plateau). Moreover, since the Middle–Late Triassic and Middle Jurassic, the two NE-trending strike-slip faults governed the formation of the West Timor and Cova-Lima sub-basins. The location along the Australian margin plays a dominant role in controlling the structural style and shaping of the Timor Orogen. Vertical loading and the southerly motion of the orogenic wedge are the main driving forces responsible for its building, illustrating a thin-skinned tectonic framework. Thrust faults nucleate in a forward-breaking sequence in the motion of thrust transport, with younger thrusts developing in front of older thrusts. Most of the collisional deformation has been classified into two styles: shallow thin-skinned and deep-seated deformation.
Broadband seismic imaging around the Banda Arc: changes in the anatomy of offshore fold-and-thrust belts
Abstract The complicated geology of the Banda region results from complex collision between the Eurasia, Australia and Pacific plates, ongoing in the region since the Late Oligocene but particularly in the study area since the Middle Miocene (from 15 Ma). Regional 2D broadband seismic data have provided improved imaging of Mesozoic and Cenozoic sedimentary successions in the region. The region comprises the deep and ultra-deep Banda Sea enclosed by a magmatic inner arc and an outer deformed zone, comprising a series of orogens. This outer orogenic zone comprises islands with extended and sometimes hyperextended continental crust, a series of marginal foredeeps and intervening fold-and thrust belts. This paper illustrates how the offshore fold-and-thrust belts that bound the fore-deeps change in size, shape and degree of basement reactivation in a clockwise sense around the Banda Arc.