Skull of Paleocene crocodile Leidyosuchus formidabilis.

Tongue River Formation, Near Sentinel Butte North Dakota

Wannagan Creek Quarry, 1976

Calumet 4X5 Monorail with 180mm Schneider Symmar

Plus-X 1/60th @f/32

Scanned with Epson Perfection 4870 Scanner
See full size crop from this image.