Oz Terra is the unofficial name given to a major geological region on Charon.

The Pluto-facing hemisphere of Charon is divided onto two primary regions; Oz Terra in the north and Vulcan Planitia in the south.

[1] The region was discovered by New Horizons during its flyby of Pluto in July 2015.

Oz Terra sits about a kilometer higher than Vulcan Planitia, and is typified by large crustal blocks, having fractured early in Charon's history.

[2] The region was formed about 4 billion years ago, when a subsurface ocean of water and ammonia flowed to the surface, and then solidified.