sedimentary
Sandstone (with potential fossil fragments)
Sandstone (SiO2 dominated with iron oxides)
Hardness 6-7 (quartz grains), dull to earthy luster, rough sandy texture, tan to brownish color with irregular pitted surfaces.
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Physical properties
Hardness 6-7 (quartz grains), dull to earthy luster, rough sandy texture, tan to brownish color with irregular pitted surfaces.
Formation & geological history
Formed through the accumulation, compaction, and cementation of sand-sized mineral grains or rock fragments in river, beach, or desert environments.
Uses & applications
Commonly used as building material, paving, landscaping stone, and as an aquifer matrix in geology.
Geological facts
Sandstone makes up about 10 to 20 percent of the Earth's sedimentary rocks. Its porosity allows it to act as a major reservoir for groundwater and petroleum.
Field identification & locations
Identified field-side by its distinctive granular sand-like texture and rough feel. Found abundantly in riverbeds, cliffs, and sedimentary basins worldwide.
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