Debris avalanches and slumps on the margins of volcanic domes on Venus: Characteristics of deposits

Mathematics – Logic

Scientific paper

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Cones (Volcanoes), Planetary Geology, Radar Imagery, Structural Properties (Geology), Synthetic Aperture Radar, Venus (Planet), Volcanoes, Volcanology, Avalanches, Collapse, Debris, Deposits

Scientific paper

Modified volcanic domes, referred to as collapsed margin domes, have diameters greater than those of terrestrial domes and were therefore thought to have no suitable terrestrial analogue. Comparison of the collapsed debris using the Magellan SAR images with volcanic debris avalanches on Earth has revealed morphological similarities. Some volcanic features identified on the seafloor from sonar images have diameters similar to those on Venus and also display scalloped margins, indicating modification by collapse. Examination of the SAR images of collapsed dome features reveals a number of distinct morphologies to the collapsed masses. Ten examples of collapsed margin domes displaying a range of differing morphologies and collapsed masses have been selected and examined.

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