Since R.E.M. split, it sounds like guitarist Peter Buck has been spending time in the garage.

The rocker is stepping out solo with a new album and now has "10 Million BC" to show for it. The boggy, Jon Spencer-styled track made its bow on WFMU this week, with Buck's collaborator in The Baseball Project, Steve Wynn, introducing it.

"10 Million BC" is from Buck's forthcoming, as-yet-untitled effort, with no word yet when to expect a whole package -- a package which may be released on vinyl-only.

R.E.M. called it quits last September. And I've really enjoyed Michael Stipe's cameos on "Colbert."