Venera Images, VENERA 13 fully calibrated image Options

[vikingmars]

Here is the Venera 13 fully calibrated image, produced from raw imaging 3-filters data (note the 3 horizons at left well discernible). It was published inside "L'Astronomie Magazine" of Societe Astronomique de France.
Enjoy !

Attached thumbnail(s)

 

[Guest_BruceMoomaw_*]

The consensus now is that what we're seeing in both the Venera 13 and 14 photos (and probably those from Venera 9 and 10) is not regular rock, but sheets of fine dust (probably impact ejecta) that's been fused into layers of friable rock by the chemical reactions that go on between soil grains and the trace gases in Venus' super-hot, super-pressurized atmosphere. Both the Venera 9 and 10 density measurements and Venera 13's penetrometer revealed the stuff to be lower in density and hardness than regular basalt (I never thought those instruments would reveal anything interesting, but they did). And this presumably explains the startling absence of any signs of aeolian movement in Magellan's images, despite the fact that Venus' low surface breeze of just 1 meter/sec should have been enough to move dust and sand around on its surface. As it is, the only dunes we see on Venus seem to be those piled up around giant impact craters, presumably by the air blast associated with each impact.

I have, when I can find it, a conference abstract on the simulation of this fusion process in an Earth lab.