The Bassen Rift on a stellar cartography map
The Bassen Rift is an area of space between Romulus and the Romulan Neutral Zone. A dense nebula field with many greenish-hued cloud formations, passage through the Rift disrupts subspace communications.
In 2379, the Bassen Rift was the location of a major conflict between the USS Enterprise-E, assisted by forces of the Romulan Star Empire, against the Reman warbird Scimitar, which was commanded by Shinzon. (Star Trek Nemesis)
This area of space was named by Nemesis screenwriter John Logan for his pet basset hound.