
The round streaks visible on this slab are of natural origin and due to water infiltrations which, combined with the iron oxides, cemented the tiny silica sand grains giving rise to the "SANDSTONE"
Cretaceous inf. About 90,000,000 years
Origin: Kanab - Utah - U.S.A.
Dimensions: 38x15 cm
Thickness: 1.3 cm
Weight: 1.42 Kg