نتایج جستجو برای: tectonic history
تعداد نتایج: 360326 فیلتر نتایج به سال:
Climatic cooling and substantial tectonic activity since the late Miocene have had a pronounced influence on the evolutionary history of the fauna of New Zealand's South Island. However, many species have recently experienced dramatic range reductions due to habitat fragmentation and the introduction of mammalian predators and competitors. These anthropogenic impacts have been particularly seve...
Studies of active mountain ranges suggest that atmospheric and geodynamic processes may be strongly coupled through erosion — a hypothesis that has led to a debate over the relative importance of climate and far-field tectonic forcing in influencing erosion. We addressed this debate by developing the detailed long-term erosional history of a transect in the central Annapurna Range of Nepal for ...
Erosion, sediment production, and routing on a tectonically active continental margin reflect both tectonic and climatic processes; partitioning the relative importance of these processes remains controversial. Gulf of Alaska contains a preserved sedimentary record of the Yakutat Terrane collision with North America. Because tectonic convergence in the coastal St. Elias orogen has been roughly ...
Introduction: Coronae are quasi-circular to circular volcano-tectonic features unique to Venus among the terrestrial planets. They were first identified in Venera 15/16 images [1], and their tectonic, volcanic, and topographic characteristics have been classified in detail using Magellan SAR image and topography data [2, 3]. Several studies of gravity signatures associated with coronae have bee...
[1] Investigation of Cenozoic deformation, sediment accumulation, and provenance in the Eastern Cordillera of Bolivia at 17–21 S indicates major shortening (60–140 km) and foredeep development followed by limited internal shortening and intermontane basin development. Contrasting histories of shortening, deposition, sediment dispersal, and detrital composition distinguish a formerly extensive P...
9 10 This paper makes a review of the interpretations of the tectonic evolution of SW Japan 11 during the last three decades. In the late 1970s, the dominant model was the so-called 12 ―Pacific-type orogeny‖, emphasizing the purported absence of nappes and the contrast with 13 the alpine chains, and interpreting the evolution as due to a steady oceanic subduction since 14 the Paleozoic time. In...
Introduction: Quantitatively, how much of an improvement in paleoerosional detail is there when THEMIS [1] and MOLA [2] data are coupled with Viking information [3]? This is a significant query, as there have been numerous Viking-based efforts to unfold the paleoerosional history of Mars, which is recorded in the distribution and relative age of channels and valley networks [e.g.,4-5]. We repor...
S U M M A R Y The Scandinavian Mountain Chain (the Scandes) exhibits characteristics that are unusual for an old, Palaeozoic mountain belt. These include renewed Neogene uplift in a passive margin setting and the lack of a pronounced crustal root. We investigate the influence of present-day thermal, compositional and geometric structures in the crust and mantle on the topography of the southern...
Ophiolitic rocks in the southeastern part of the Zagros Orogenic Belt can be separated from southwest to northeast, into two groups: the Neyriz ophiolites and the Naien–Shahrebabak–Baft ophiolites. The southeast sector of Sanandaj-Sirjan wasdelimited by the two nearly synchronous ophiolitic belts in its southwestern and northeastern margins. In this study, new ophiolitic formation models were u...
Leg 178 will drill eight sites off the Pacific margin of the Antarctic Peninsula to provide a highresolution record of Antarctic continental climate over the past 6-10 m.y. and a direct check on the presumed glacio-eustatic origin of global sea-level change over the same period. Moreover, it is an essential preliminary to the more difficult task of extracting the complete Cenozoic record of Ant...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید