scholarly journals Crustal structure of the Hatton and the conjugate east Greenland rifted volcanic continental margins, NE Atlantic

2009 ◽  
Vol 114 (B2) ◽  
Author(s):  
Robert S. White ◽  
Lindsey K. Smith
Keyword(s):  
Crustal Structure ◽  
Continental Margins ◽  
Ne Atlantic ◽  
East Greenland

LATE CENOZOIC SEISMIC STRATIGRAPHY AND GLACIAL GEOLOGICAL DEVELOPMENT OF THE EAST GREENLAND AND SVALBARD–BARENTS SEA CONTINENTAL MARGINS

1998 ◽  
Vol 17 (1-3) ◽  
pp. 155-184 ◽  
Author(s):  
ANDERS SOLHEIM ◽  
JAN INGE FALEIDE ◽  
ESPEN S. ANDERSEN ◽  
ANDERS ELVERHØI ◽  
CARL FREDRIK FORSBERG ◽  
...  
Keyword(s):  
Barents Sea ◽  
Seismic Stratigraphy ◽  
Continental Margins ◽  
Late Cenozoic ◽  
East Greenland

Crustal structure and evolution of the southern Vøring Basin and Vøring Transform Margin, NE Atlantic

2006 ◽  
Vol 415 (1-4) ◽  
pp. 167-202 ◽  
Author(s):  
T. Raum ◽  
R. Mjelde ◽  
H. Shimamura ◽  
Y. Murai ◽  
E. Bråstein ◽  
...  
Keyword(s):  
Crustal Structure ◽  
Ne Atlantic ◽  
Transform Margin ◽  
Vøring Basin

scholarly journals Crustal structure of the Goban Spur rifted continental margin, Ne Atlantic

1994 ◽  
Vol 119 (1) ◽  
pp. 1-19 ◽  
Author(s):  
Susan J. Horsefield ◽  
K. Robert B. Whitmarsh ◽  
Robert S. White ◽  
Jean-Claude Sibuet
Keyword(s):  
Continental Margin ◽  
Crustal Structure ◽  
Ne Atlantic ◽  
Rifted Continental Margin ◽  
Goban Spur

The origin of elevated plateaus along passive continental margins

2020 ◽  
Author(s):  
Johan M. Bonow ◽  
Peter Japsen ◽  
Paul F. Green ◽  
James A. Chalmers
Keyword(s):  
Sea Level ◽  
Continental Margins ◽  
East Greenland ◽  
Passive Margins ◽  
Base Level ◽  
Wide Range ◽  
The World ◽  
Incised Valleys ◽  
Break Up ◽  
High Level

<p>Many passive continental margins around the world are characterised by elevated plateaus at 1 to 2 km or more above sea level cut by deeply incised valleys and commonly separated from an adjacent coastal plain by one or more escarpments. Mesozoic–Cenozoic rift systems parallel to the coast are commonly present offshore with a transition from continental to oceanic crust further offshore. These landscapes occur in arctic, temperate and tropical climate and in different geological settings independent of the time span since break-up (e.g. along the Atlantic from south to north).</p><p>The plateaux are typically more than 100 km wide, much larger in some cases, and extend hundreds of kilometres along the margin, cutting across bedrock of different ages and resistances. The key to understanding the formation of regional, low-relief erosion surfaces is the base-level, as this is the level to which fluvial systems grade the landscape. The most likely base level is sea level, particularly for locations along continental margins during the post-rift development of passive margins.</p><p>It is commonly assumed that the characteristic, large-scale morphology of elevated, passive continental margins with  high-level plateaux and deeply incised valleys persisted since rifting and crustal separation Further, it is assumed that the absence of post-rift sediments is evidence of non-deposition, despite continental-stretching theory predicting deposition of a thick post-rift sequence overlying both the rift and its margins.</p><p>However, our studies of the passive continental margins of West and East Greenland, Norway, NE Brazil and southern Africa provide evidence of km-scale, post-rift subsidence and that the plateau surfaces were graded to sea level long after break-up and subsequently lifted to their present elevations. In some of these cases, the presence of post-rift marine sediments at high elevation provide direct proof of this interpretation. Since elevated plateaux cut by deeply incised valleys are a characteristic feature of these and other margins, this similarity suggests that such topography elsewhere in the world may also be unrelated to the processes of rifting and continental separation. We present a wide range of evidence from passive margins around the world in support of this hypothesis,</p><p> </p><p>Bonow et al. 2014: High-level landscapes along the margin of East Greenland – a record of tectonic uplift and incision after breakup in the NE Atlantic. Global and Planetary Change.</p><p>Green et al. 2018: Post-breakup burial and exhumation of passive continental margins: Seven propositions to inform geodynamic models. Gondwana Research.</p><p>Japsen et al. 2019: Elevated passive continental margins: Numerical modeling vs observations. A comment on Braun (2018). Gondwana Research.</p>

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