Ferris of Number 1 coal seam at base of Ravenscrag formation
- WOK 1-138
- Pièce
- 1954
Fait partie de W.O. Kupsch fonds
Ferris of Number 1 coal seam at base of Ravenscrag (Paleocene) formation at type section. Notice shale break. Ravenscrag, Butte, Sask.