Tracklist :
1 Obsidian 22'31
Barry Guy / Paul Lytton / Evan Parker
2 Chert 13'11
Barry Guy / Paul Lytton / Evan Parker
3 Gabbro 17'29
Barry Guy / Paul Lytton / Evan Parker
4 Scoria 8'21
Barry Guy / Paul Lytton / Evan Parker
Credits:
Bass – Barry Guy
Drums – Paul Lytton
Soprano Saxophone, Tenor Saxophone – Evan Parker