River Cobble look-alikes
Sedimentary Rock (likely sandstone or greywacke)
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Open the appSeveral rocks and minerals can be confused with River Cobble. Below are documented look-alikes and the features that tell them apart. Never rely on a single feature. Always check multiple properties.
Similar rocks to compare
Pebble
Pebble (compositionally variable)
Also known as: Fluvial Pebble
Boulder
Boulder (compositionally variable)
Also known as: Fluvial Boulder
Glacial Cobble
Cobble (compositionally variable, often faceted or striated)
Also known as: Till Cobble
Beach Cobble
Cobble (compositionally variable, often well-sorted)
Also known as: Marine Cobble
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