The things are about 100 m wide.Width of this picture is about 170 km.
Update: I posted this question on the Astrisk-forum. Hope they can help.
Update2: Here is a close up of the connecting features in visible light. If I'm not mistaken there's a dustdevil to the right. Can they be the cause of the features?
Update3: The guys at the asterisk forum have probably solved the riddle. The line-dots are probably cased by volcanic activity: the cracks are weak spots in a volcanicly active region and that's where the domes pop out. Thanks guys!
However, now that we're busy, I found this rather artistic view in the same region. looks great, doesn't it? :)