Mastodon have confirmed the release of four-track EP Cold Dark Place on September 22 via Reprise Records.

Three of the songs were recorded during sessions for 2014 album Once More ‘Round The Sun, while the fourth was laid down while the band worked on most recent LP Emperor Of Sand.

The release had been expected for some time. Guitarist Brent Hinds previously discussed the project as mainly a solo writing project, with recording assistance from bandmates Brann Dailor and Troy Sanders.

Hinds – who revealed the EP cover last week, although it was generally thought to be a full-length release at the time – said last year: “It’s an album I wrote myself and recorded with Brann and Troy during the Once More ‘Round The Sun sessions. It has to do with a nasty breakup that I went through.”

A limited-edition vinyl picture disc version will be launched on October 27.

Hinds, Dailor and colleague Bill Kelliher appeared as White Walkers on the Game Of Thrones series finale, which aired on US TV on August 27 and on UK TV last night. It was their second appearance on the show.

Mastodon commence a US tour next month, with UK dates to follow in December. Full dates below.