For each of the 5970 streaks in the data base, information was compiled on location, streak type, radar backscatter, dimensions, azimuth, orientation with respect to local slope, and type of landform with which it is associated. Wind streak azimuths were analyzed to assess wind patterns at the time of their formation. Both hemispheres show strong westward and equatorward trends in azimuths, consistent with Hadley circulation and inferred upper atmospheric westward zonal winds. The presence of equator-oriented streaks at high latitudes suggests that Hadley circulation extends to the poles. Analysis of non-type P streaks in the area suggests that equatorward winds are funneled through the depression and are responsible for the erosion of the terrain to form the yardangs.
Dune deposits are limited on Venus.
Microdunes are proposed for some southern hemisphere areas which show distinctive radar reflectivities. The ASU Planetary Geology Group is under the direction of Dr. Ronald Greeley.