sedimentary
Mixed River Pebbles and Rock Collection
Polymictic lithic conglomerate, sandstone, and quartz pebbles
Hardness varies from 6 to 7 on the Mohs scale depending on the specific rock type. Colors range from grayish-green, reddish-brown, to dark gray-black. Luster is dull to sub-vitreous. Textures include smooth water-worn surfaces, fine-grained sandstone, and granular conglomerate.
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Physical properties
Hardness varies from 6 to 7 on the Mohs scale depending on the specific rock type. Colors range from grayish-green, reddish-brown, to dark gray-black. Luster is dull to sub-vitreous. Textures include smooth water-worn surfaces, fine-grained sandstone, and granular conglomerate.
Formation & geological history
Formed through various geological processes including mechanical weathering, water transport, and deposition in riverbeds or marine environments over millions of years.
Uses & applications
Used in landscaping, decorative landscaping, garden pathways, and rock tumbling or specimen collecting.
Geological facts
Water-worn rocks like these undergo rigorous abrasion in riverbeds, which rounds their sharp edges into smooth pebbles over long distances of transport.
Field identification & locations
Commonly found in streambeds, riverbanks, beaches, and glacial outwash plains. Useful for studying local geology and provenance.
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