sedimentary

Red sandstone with pale weathered surface

Iron-oxide-stained quartz arenite (sandstone)

AI-generated identification · may be incorrect

Fine- to medium-grained, reddish-brown rock with a pale cream weathering rind and irregular fractures. Mostly quartz with iron-oxide cement; quartz hardness is 7 Mohs, but the rock may crumble, and its luster is dull.

Identified October 14, 2026More sedimentary →

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Physical properties

Formation & geological history

Sand grains were compacted and cemented in a sedimentary basin; iron oxides imparted the red color. The image alone cannot establish its age or precise formation environment.

Uses & applications

Used as building and paving stone, landscaping material, and aggregate where sufficiently durable; usually modest collector interest.

Geological facts

Red coloration commonly comes from hematite or related iron oxides coating grains or cementing them.

Field identification & locations

Look for gritty texture, visible sand grains, and red staining; the pale outer surface likely reflects weathering. Red sandstones occur worldwide, but location is needed to narrow identification.