The Frozen Borderline – 1968–1970 is a compilation album by German musician Nico, released in 2007 by record label Rhino. The album comprises remastered versions of her studio albums The Marble Index (1968) and Desertshore (1970), along with early/alternate versions of several tracks and two previously unknown tracks.
Tracks 1 to 8 are remastered versions of the songs from The Marble Index. Track 9 and 10 are two previously unknown songs. Track 11 and 12 are alternate versions of the two bonus tracks from the 1990 CD release of The Marble Index. Track 13 to 19 are early versions of the songs.
Tracks 1 to 8 are remastered versions of the songs from Desertshore. Track 9 to 14 are early versions of the songs. Track 14 contains a hidden 15th track that starts after ten minutes of silence.