Tags: Crater.
Ovda Regio is a region on Venus that forms the western part of Aphrodite Terra. Magellan images show a complex surface with several generations of structures. A pervasive fabric of irregular broad domes and ridges and associated curvilinear valleys was flooded by lava then fractured. The circular feature surrounded by dark lava flows in the western part of the image is a caldera or large volcanic collapse pit. Late-stage extension created long graben or fault-bounded valleys are seen.