Magellan press release image showing radio-thermal emission (emissivity). Red represents high emissivity and blue low. The image is centered at 12.5S,261E, southeast of Phoebe Regio, Venus and is 587 km on a side. The unnamed volcano is about 2 km high and shows low emissivity at the summit, which could indicate the presence of pyrrohtite or pyrite, minerals which may not be stable at lower altitudes. (Magellan press release P-40698)
NASA/JPL
<a rel="nofollow" class="external free" href="ftp://nssdcftp.gsfc.nasa.gov/miscellaneous/planetary/magellan/mgn_p40698.tiff">ftp://nssdcftp.gsfc.nasa.gov/miscellaneous/planetary/magellan/mgn_p40698.tiff</a>