Venus - Magellan

The tick volcano, northeast of Alpha Regio, Venus

Venus
Magellan radar image of the type volcanic feature known as a "tick",northeast of Alpha Regio, Venus. These features are characterized by a caldera within a smooth depression surrounded by a raised rim with radial spurs. The rim in this case has a diameter of about 30 km. North is up. (Portion of Magellan F-MIDR 20S003;1,framelets FF-07,08,15 and 16) 

Venus
Venus Geology and Geophysics
Magellan Mission
Volcanism in the Solar System