It truly was a shame that "Singing Mountain" was cut, in my books it is a a powerful song, that if done right, could've had a killer heavy-metal rendition of it. I'm actually thinking that if I ever get a band going (I'm a bassist who has not had motivation to practice for the longest time), I'd probably be trying to do a heavy metal rendition of the song. First though, I gotta get my skills up to par again before I consider it.
But yeah, it's a shame that Singing Mountain was cut, I am absolutely certain that it would've rocked. And yeah, I think it probably would've been the maze that you go through when you first come to 65,000,000 B.C. It probably would've been a much better maze to go through in my books, complete with 1000% better music. Yes, I think Singing Mountain was that damn good, and it is a shame that it wasn't used in the game itself. But ah well, maybe if Square remakes Chrono Trigger for a handheld, they'll include all the cut areas from within the game.