The rounded strokes visible on this slab are of natural origin and due to water infiltrations which, combining with iron oxides, have cemented the tiny grains of silica sand giving rise to the SANDSTONE
Lower Cretaceous - about 90,000,000 years
Provenance: Kanab - Utah - U.S.A.
Dimensions: 19x8.5 cm
Thickness: 1.4 cm
Weight: 440 g