Selected volcanic features, part L

Abstract

Volcanic features obtained from a preliminary examination of Apollo 15 orbital photographs are described. Of particular interest are the features photographed in the vicinity of the far-side crater basin Tsiolkovsky. The photographs indicate that smooth, plains-forming material is present in parts of the ejecta blanket southeast of the basin rim. A debris flow on the northwestern part of the rim is also depicted. The usefulness of near-terminator photography is evidenced by the fact that numerous flow fronts not seen in photographs taken at higher angles of illumination are clearly visible. It is concluded that the presence of so many fronts confirms the belief that multiple flows are responsible for the filling of lunar mare basins.