Release date: August 28th, 2026 Record label: Loma Vista Recordings The Riff Doctor’s Score: RRRR – 4/5 DIAGNOSIS: Marrow Deep carries grief in its bones but refuses to be buried beneath it. Overlong and occasionally too crowded for its own good, it nevertheless finds Mastodon turning absence into some of their heaviest, most progressive and emotionally powerful music in years. THE FULL REVIEW Death has cast its shadow across MASTODON’s music before. From the deeply personal