JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIF. 91109

PHOTO CAPTION                                MAGELLAN
                                             P-36547  MGN-6
                                             8/23/90


This three-dimensional representation of brightness variations in
a Magellan radar image of Golubkina crater enhances the structural
features of the crater.  Golubkina is 34 km (20.4 miles) in
diameter, and is located at about 60.5 degrees north latitude,
287.2 degrees east longitude.  Golubkina is characterized by
terraced inner walls and a central peak, typical of large impact
craters on the Earth, Moon and Mars.  The terraced inner walls form
at late stages in the formation of an impact crater, due to
collapse of the initial cavity formed by the meteorite impact.  The
central peak forms due to rebound of the inner crater floor.