ИСТИНА

Samodiva Mons (13.6º N, 291.0º E) and surrounding area are located east of Beta Regio major plume center, at the southern end of Hyndla Regio, a flat-topped highland consisting mostly of tesserae. The Samodiva area is within Quadrangle V-29, for which some 1:5 M scale mapping has been done. In the present research we focus on detailed 1:500,000 scale mapping. Overall width of the edifice is 150 km and a central summit caldera has 25 km in diameter and up to 500 m deep. At this stage of mapping it can be concluded that: 1) Grabens (interpreted to overlie dyke swarms) can be grouped into at least seven sets on the basis of trends and cross-cutting relationships; 2) Regional plains on the North seem to be older than lava flows and covered by aeolian debris from tesserae; 3) On the east side there are several distinct lava flows originating from Samodiva Mons, and these are interpreted to be younger than the yellow radiating graben system; 4) Most of the map area is covered by wrinkle ridges, which may serve as a marker of relative ages