Sandstone or Limestone

Physical Properties

Earthy color (tan, brown, yellowish), grainy texture, variable hardness depending on cementation.

Formation & Geological History

Formed by the accumulation and cementation of sand grains or calcium carbonate over geological time.

Uses & Applications

Used in construction, landscaping, and architecture.

Geological Facts

Common sedimentary rocks have been used as building materials for thousands of years.

Field Identification & Locations

Identified by its granular texture or reaction to dilute hydrochloric acid (if limestone). Often found in ancient seabeds, riverbeds, and desert environments.

Identified on: 4/26/2026

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