Results 171 to 180 of about 23,241 (210)
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Paleocurrents and Paleogeography
AAPG Bulletin, 1962The objective of this paper is to review the criteria used for direction of sediment transport and to outline the ways in which such knowledge can be used to make paleogeographic reconstructions. The criteria of transport direction which have been found to be most useful are cross-bedding, the various linear sole markings of sandstone beds, and the ...
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Neotectonics and Recent Paleogeography
2021The Northern Hellenides are characterized by slow convergence between the Apulian platform and the European margin with a rate of 8mm/year whereas the Southern Hellenides are characterized by a rapid oceanic subduction with a rate of 40–50mm/year. The Cephalonia right-lateral strike–slip fault forms a tear of the crust with 100km of horizontal slip ...
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Paleogeography of Turkmenistan
1994The paleogeographic history of Turkmenistan since the Upper Cretaceous period is reviewed, with emphasis on climatic changes and development of the biota. In the Cretaceous, climate become more differentiated; seasonal temperature changes and latitudinal zonality of vegetation appeared; and the desert climatic regime was established.
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Paleogeography and Paleoclimatology
1990Paleogeography and paleoclimates are central aspects of Project CRER that relate to all the other working groups. The initial, short-term, pilot project in paleogeograph is to prepare a map of landmasses, seas, highlands, and lowlands for the Ultra-thermal period, the latest Cenomanian to earliest Turonian.
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Cretaceous paleogeography of Antarctica
Palaeogeography, Palaeoclimatology, Palaeoecology, 1987Abstract During the Early Cretaceous, Antarctica formed the center piece of a large landmass extending from South America across the southern latitudes to Australasia. The eastern sector of this austral landmass was dominated by broad craton consisting of East Antarctica and Australasia.
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Paleogeography and Petroleum Exploration
SEPM Journal of Sedimentary Research, 1943ABSTRACT Paleogeography in a broad way controls the deposition and distribution of source beds and reservoirs. The search for new deposits of petroleum is aided by the use of special paleogeographic maps. The term eulithogeography is introduced to cover distribution of favorable lithologic areas.
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Fragmentation and Mesozoic Paleogeography
1982Fragmentation of Gondwana took place in two phases. Between 190 Ma and 160 Ma, separation followed a line down the eastern flank of the Mozambique Ridge (Dietz and Holden, 1970; Scrutton, 1973b; Kutina, 1975; Du Toit, 1976). This line of fracture paralleled the trend of the Lebombo rhyolites and tholeiitic basalts, a zone of crustal rupture that ...
A. J. Tankard +5 more
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Permian Paleogeography and Climatology
1976An empirical attempt has been made to generate summer and winter surface wind patterns for the Lower and Upper Permian using as a base paleogeographic maps derived from paleomagnetic and regional geological considerations. Although problems remain, the maps so produced show general good agreement.
A. E. M. Nairn, M. E. Smithwick
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Paleogeography and Paleoclimate
2011An island extended in the Late Jurassic like a broad strip from London in the west over the Ardennes at least to the Rhenish Massif and possibly to the Bohemian Massif (Gygi 2000a, Fig. 2, adapted and simplified after Ziegler 1988, Pl. 13, and refigured here as Fig. 1.1).
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Paleozoic paleogeography of Arizona
Geological Society of America Bulletin, 1942In Arizona two major areas of deposition separated by Mazatzal Land had already been established by late pre-Cambrian time. The first Paleozoic transgression from the northwest, starting possibly late in the Early Cambrian and depositing the Tapeats sandstone, reached central Arizona.
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