sedimentary

Gravelly, weathered sediment (likely glacial till)

Unconsolidated diamicton; mixed lithologies, commonly including quartz, feldspar, and weathered silicate rock fragments

AI-generated identification · may be incorrect

Mostly gray-brown, poorly sorted sand, silt, and rounded to angular pebbles; individual grains are typically Mohs 2–7, with dull to earthy luster and no consistent crystal structure or cleavage. The central pebble appears light-gray and fine-grained, but cannot be identified confidently from the image alone.

Identified August 12, 2026More sedimentary →

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Physical properties

Formation & geological history

Likely deposited as glacial till, stream gravel, or compacted soil-derived sediment; its age depends on local geology and may range from recent to Pleistocene. It is unconsolidated rather than a true lithified rock.

Uses & applications

Used as fill, road base, drainage aggregate, and landscaping material; individual stones generally have negligible commercial or collector value.

Geological facts

Mixed grain size and composition are characteristic of poorly sorted deposits. Surface weathering, soil coating, and low image resolution obscure the source rock.

Field identification & locations

Identify by examining fresh broken surfaces, grain composition, sorting, and any layering; a hand lens, streak test, and hardness testing help distinguish quartz-rich gravel from volcanic or carbonate fragments. Such deposits are widespread in glaciated and alluvial regions.