Does global cooling reduce relief?
Article Abstract:
New research indicates that a shift to a more erosive climate would bring a decrease or no change in topographic relief in active mountain ranges. This suggests a negative or absent coupling between cooling and mountain uplift. In tectonically active mountain ranges, a more erosive climate should cut relief in fluvial landscapes and lead to little change in relief in glaciated landscapes. It is suggested that erosion by alpine glaciers generates relief by lateral support for valley walls by glacial ice, valley widening and formation of hanging valleys and overdeepenings.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Record of emergent continental crust approximately 3.5 billion years ago in the Pilbara craton of Australia
Article Abstract:
The oldest greenstone successions with angular unconformity indicating an ancient erosion surface were newly discovered to be under the rocks of 3.46-Gyr Warrawoona Group in the Pilbara craton of Australia. This discovery supports the tectonic evolutionary models that believe during the first billion years of Earth's history, the early Archaeon period, considerable volumes of continental crust were already present The unconformity dates to between 3.47 and 3.46 Gyr and those greenstones must have been on an already rigid, buoyant and cool crust.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Subduction erosion along the Middle America convergent margin
Article Abstract:
Two mechanism of basal erosion, by seamount tunnelling and removal large rock lenses, are identified from seismic images. Seismic cross sections reveal that erosion could extend along much of the convergent margin of Middle America.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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