Jostling Pack Ice(ish) on Venus

Post contributed by Prof. Paul K. Byrne, Department of Earth and Planetary Science, Washington University in St. Louis, USA.

Venus is a tectonically tortured world (Image 1). Vast rift systems, widespread crustal shortening, and a crumpled terrain type, tessera, collectively attest to major tectonic activity on a world only a little smaller than Earth. In places, strains are spatially distributed; in others, extension or shortening is concentrated into narrow bands. And, where these bands intersect, they define a type of tectonic deformation on Venus that hasn’t been recognised before.

Image 1: A 1,100 km-wide, false-colour radar view of Lavinia Planitia, one of the lowland regions on Venus where the lithosphere has fragmented into blocks (purple) delineated by belts of tectonic structures (yellow). Image credit: Paul K. Byrne.


Valley Networks on Venus

Posted by Dr. Goro Komatsu, IRSPS, Univ. G.d’Annunzio, Italy.  

(Re-posted from IAG Image of the Month, December, 2007)

“…excitement and pleasure in science derive not so much from achieving the final explanation as from discovering the fascinating range of new phenomena to be explained” (Baker and Komatsu, 1999).”

Networks on Venus

The Magellan spacecraft acquired SAR (Synthetic Aperture Radar) images of venusian surfaces at a spatial resolution range of about 100 m per pixel.


Vir-Ava Chasma, Venus

Posted by Les Bleamaster, Planetary Science Institute, Tucson, Arizona, USA.

(Re-posted from IAG Image of the month, July 2007)

This false color, three-dimensional perspective view over the Turan Planum of Venus shows the interaction of tectonic structures and volcanic processes along chasmata or “rifts.”


Foreground is approximately 400 km, with a vertical exaggeration of 8x.


Volcanic Regions on Venus

Posted by Les Bleamaster, Planetary Science Institute, Tucson, Arizona, USA.

(Re-posted from IAG Image of the Month, May, 2007)

Synthetic Aperture Radar (SAR) images from NASA’s Magellan mission to Venus (science mission complete in 1994) show two distinctly different volcanic regions within only a few hundred kilometers of each other. venusgeo (more…)

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