From Halopedia, the Halo wiki
Halo: Combat Evolved Anniversary: Original Soundtrack
Martin O'Donnell and Michael Salvatori (adapted by Brian Trifon, Lennie Moore, Paul Lipson, and Tom Salta)
A Private Service
Yawning Chasm is the sixth track (Disc 1 Track 6) in Halo: Combat Evolved Anniversary: Original Soundtrack.
The track is an arrangement of its namesake The Maw from Halo: Original Soundtrack. The opening section is also featured in the later track Flotsam, Jetsam.
The track plays in place of The Maw in Halo: Combat Evolved Anniversary, when the John-117 and Cortana, riding in a Banshee, return to the Pillar of Autumn in the level The Maw.