sedimentary

Small brown-gray rock fragment

Unidentified fine-grained rock; exact lithology cannot be determined from the image

AI-generated identification · may be incorrect

Angular, dull, brown-gray fragment with a rough, uneven surface and no visible crystals or cleavage. Hardness, mineral composition, and specific gravity cannot be reliably assessed visually.

Identified October 15, 2026More sedimentary →

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Physical properties

Angular, dull, brown-gray fragment with a rough, uneven surface and no visible crystals or cleavage. Hardness, mineral composition, and specific gravity cannot be reliably assessed visually.

Formation & geological history

Likely a naturally weathered rock fragment; its formation process and geological age cannot be established from the photograph.

Uses & applications

No obvious commercial use at this size; may be kept as a field or teaching specimen.

Geological facts

The image does not show diagnostic layering, fossils, crystal grains, or other features that would support a more specific identification.

Field identification & locations

A close-up of a fresh break, hardness test, and location of collection would help distinguish common possibilities such as sandstone, mudstone, or weathered igneous rock.