In some places the domesoverlie the faults. The faults and troughs extend into the lower part of theimage where they terminate against dark plains deposits and are crosscut atright angles by additional faults. The relationship between these featuresindicates that multiple episodes of faulting and volcanism have occurred. On this bright, lineated terrain Alpha Regio is a series of troughs, ridges, and faults running in every direction. Low-lying areas appear dark in the radar images and may be filled with lava.
Volcanoes appear as bright spots on thesmooth plains.
Notice the large volcano in the upper right. The black square represents missing data. Highlands Several tectonic events formed this complex terrain, which is part of the interior of Ovda Regio. The complexity of Ovda Regio attests to a long history of tectonic deformation. Eastern Lakshmi Lava flows blanket the flat plains region of eastern Lakshmi.