From the recording The Intelligence of Rocks

The BLU-80/B BIGEYE bomb was a developmental U.S. air-launched binary chemical weapon. The BIGEYE was a 500-pound (230 kg) class glide bomb with a radar altimeter fuse intended to disperse the binary generated VX nerve agent, made in flight from the non-lethal chemical components QL and sulphur only after aircraft release. Initially approved in the 1950s, the program persisted into the 1990s (Wikipedia)
Musically the underlying idea (as in No.2 Gneiss, above) is that even in the extremity of human extermination, there is a natural process at work. That our apparently wilful self-destruction is part of the regulation of the planet.