1 edition of Geodynamic evolution of the Transantarctic Mountains and the West Antarctic rift system found in the catalog.
Geodynamic evolution of the Transantarctic Mountains and the West Antarctic rift system
Includes bibliographical references (p. 47-50).
|Statement||edited by Terry J. Wilson and Carol A. Finn.|
|Series||Report / Byrd Polar Research Center -- no. 9., Report (Byrd Polar Research Center) -- no. 9.|
|Contributions||Wilson, Terry Jean, 1954-, Finn, Carol Ann.|
|The Physical Object|
|Pagination||iv, 57 p. :|
|Number of Pages||57|
Transantarctic Mountains, mountain system subdividing the Antarctic continent into an eastern (East Antarctica) and a western (West Antarctica) Transantarctic Mountains stretch for more than 2, miles (3, km) from Victoria Land to the shores of the Weddell to 14, feet (4, metres) at Mount Kirkpatrick in the Queen Maud Mountains, they traverse a region that is. Tectonics of the West Antarctic Rift System: New Light on the History and Dynamics of Distributed Intracontinental Extension C. S. Siddoway1 ABSTRACT and the context for active volcanism (Behrendt et al., , ) arising at a time of instability of the West Antarctic The West Antarctic rift system (WARS) is the product of ice sheet, when.
This workshop builds on an earlier evaluation of the geodynamic evolution of the Transantarctic Mountains and associated West Antarctic Rift System as a whole (Wilson and Finn, ). This workshop also dealt with two aspects of the geology not specifically considered in that earlier report: the pre-Devonian basement rocks and the Beacon Supergroup. Currently, my research focuses on the evolution of the Transantarctic Mountain (TAM) and the adjacent West Antarctic Rift System (WARS). I use numerical models to explore how the evolution of the WARS is related to the development of the TAM.
The Cenozoic volcanoes in the Transantarctic Mountains are located on the East Antarctic rim of the West Antarctic rift system (Section ). The opposite side of this rift in Marie Byrd Land also contains Cenozoic volcanoes in the Flood Range, the Erven Nunatak, the Executive Committee Range, and in the USAS Escarpment, all of which appear. What the techniques of modern science have revealed is that Antarctica is a land of broad and awe-inspiring geologic variety. Its most prominent mountain range, the Transantarctic Mountains in the western half of Antarctica, is about 3, kilometres long and features the highest mountain on the continent (Vinson Massif, at 4, metres).
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The West Antarctic Rift System (WARS) is a –km-wide continental extensional province lying beneath the Ross Sea and Ross Ice Shelf between Marie Byrd Land on the east and the Transantarctic Mountains (TAM) at the edge of the East Antarctic craton on the west.
The timing and distribution of extension in the WARS are not tightly constrained, particularly beneath the West Cited by: 3. Geological Evolution of Antarctica is a collection of papers presented at the Fifth International Symposium on Antarctic Earth Sciences, held under the auspices of the Scientific Committee on Antarctic Research (SCAR) at Robinson College, Cambridge, August Contributors were invited to address problems related to the tectonic evolution of the Antarctic crust and the.
The West Antarctic Rift System is a series of rift valleys lying between East and West Antarctica. It encompasses the Ross Embayment, the Ross Sea, the area under the Ross Ice Shelf and a part of Marie Byrd Land in West Antarctica, reaching to the base of the Antarctic Peninsula.
It has an estimated length of km and a width of approximately km. Its evolution is due to lithospheric. Tectonics and landscape evolution of the Antarctic plate since the breakup of Gondwana, with an emphasis on the West Antarctic Rift System and the Transantarctic Mountains Article.
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Tectonic models for the Late Cretaceous/Tertiary evolution of the West Antarctic Rift System range from hundreds of kilometres of extension to negligible strike-slip displacement and are based on a variety of observations, as well as kinematic and geodynamic models.
(B) P WAI, in the interior of the West Antarctic Rift System. (C) P TZW, at the West Antarctica edge of the region of transitional lithosphere between East and West Antarctica.
The West Antarctic rift system extends over a × km, The Transantarctic Mountains part of the rift shoulder (and probably the entire shoulder) has been interpreted as rising since about 60 Ma, at episodic rates of ∼1 km/m.y., most recently since mid‐Pliocene time, rather than continuously at the mean rate of m/m.y.
1. Introduction. The Transantarctic Mountains (TAM) are a spectacular km long mountain range which marks the boundary between cratonic East Antarctica, and adjacent regions of Mesozoic and Cenozoic assembly (West Antarctica) [Dalziel, ].The TAM represent the largest noncollisional mountain range in the world [ten Brink et al., ], and there has been considerable Cited by: Tectonic models for the Late Cretaceous/Tertiary evolution of the West Antarctic Rift System range from hundreds of kilometres of extension to negligible strike-slip displacement and are based on a variety of observations, as well as kinematic and geodynamic models.
West Antarctica consists of several tectonic terranes that acted individually during the break-up of Gondwana (Storey et al., ; Storey and Alabaster, ).The only dated Precambrian rocks (of Grenvillian age) in West Antarctica are from the Haag Nunataks at the Antarctic Peninsula end of the Ellsworth-Whitmore mountains (Wareham et al., ), which form a topographic basement.
Published by the American Geophysical Union as part of the Antarctic Research Series, Volume The Antarctic Research Series, an outgrowth of research done in the Antarctic during the International Geophysical Year, was begun early in with a grant from the National Science Foundation to AGU.
The Great Escarpment of southern Africa and the Transantarctic Mountains are examples of the first and the second variants of rift flanks, respectively.
Both rift flanks are bordered on their landward side by broad continental basins: the Kalahari and the Wilkes hinterland basins. East Antarctic/West Antarctic Connections: The Ross Sea Rift and Uplift of the TAM The Ross Sea Rift Cretaceous and Cenozoic Uplift of the Trans Antarctic Mountains 9. Glacial History: the Icing on the Geocake Glossary Bibliography Biographical Sketch Summary Antarctica is the last discovered and most inhospitable of the continents.
The tectonic evolution of the Transantarctic Mountains appears to have begun when Antarctica broke away from Australia during the late Cretaceous and is ongoing, creating along the way some of the longest mountain ranges (at kilometers) formed by rift flank uplift and associated continental rifting.
The Transantarctic Mountains (TAM) separate East and West Antarctica. The prominent tectonic feature of West Antarctica is the West Antarctic Rift System where the main phase of rifting occurred between and 85 Ma but episodic extension has continued into the Cenozoic (Behrendt et al., ).
Extension within the rift system has left the majority of West Antarctica below sea level, with the exception of Marie. The Transantarctic Mountains are some of the oldest mountains in Antarctica. They were formed approximately 65 million years ago during the Cenozoic period when the West Antarctic Rift opened and continental crust was forced to uplift.
The range consists of many sedimentary layers which lie on top of a basement, or core, of granite and gneiss rocks. towards East Antarctica. This evolution is consistent with the presence of a Mesozoic West Antarctic Plateau as suggested by geodynamic models (Bialas, in press; Huerta & Harry, ).
Summary. Recent geomorphic and thermochronologic studies in the Byrd drainage system present a paradoxical suite of data that are difficult to interpret under the current paradigm that the Transantarctic Mountains are an.
The Transantarctic Mountains are considerably older than other mountain ranges of the continent that are mainly volcanic in origin.
The range was uplifted during the opening of the West Antarctic Rift System to the east, beginning about 65 million years ago in the early Cenozoic. The Transantarctic Mountains of southern Victoria Land: the application of apatite fission track analysis to a rift shoulder uplift.- Tectonics, 11, – CrossRef Google Scholar.
The Transantarctic Mountains (TAM) are an imposing topographic feature, forming the western shoulder of the Meso-Cenozoic West Antarctic Rift System. The Antarctic Ice Sheet, containing x km3 of glacial ice (Drewry et al., ; Vaughan ), is the largest glacial system on Earth.
The western part of the present Antarctic ice sheet (West Antarctic Ice Sheet, WAIS), west of the Transantarctic Mountains (Fig. 1), is largely marine-based, currently very dynamic and. However, at least for mantle depths ≥∼ km, this anomaly does not extend grid north along the Transantarctic Mountains (TAMs) and beneath the West Antarctic Rift System.The Transantarctic Mountains are considerably older than other mountain ranges of the continent that are mainly volcanic in origin.
The range was uplifted during the opening of the West Antarctic Rift to the east, beginning about 65 million years ago in the early Cenozoic.