Other
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..459g&link_type=abstract
Lunar and Planetary Science, volume 27, page 459
Other
2
Basalt, Canali, Pancake Domes, Venus, Volcanism
Scientific paper
Magellan images of Venus reveal a wide array of volcanic landforms. Some of these are similar to those observed on Earth, whereas others are unique within the solar system. Among the latter are canal), long (>1000 km), sinuous, relatively narrow channels (~3 km) with almost constant width along their lengths; and "pancake domes", circular, steep-walled features >25 km in diameter. Similarly, Venusian lava flows commonly approach 1000 km in length-much longer than typical terrestrial lava flows. The uniqueness of the venusian lava forms has prompted workers to propose that exotic or evolved lava compositions were responsible for their formation. For example, carbonatite or sulfur flows have been suggested as the formational agents for Venusian canal), and others have suggested that the pancake domes are composed of rhyolitic lavas or extraordinarily frothy basalts even though it is difficult to explain how such large volumes of exotic or evolved lava could have been generated on Venus, especially in the absence of Earth-like plate tectonics. However, it is not only possible, but likely, that all of these venusian lava morphologies can be explained through the interaction between large volumes of basaltic lava and the dense, thick, hot venusian atmosphere.
Gregg Tracy K. P.
Sakimoto Susan E. H.
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