River Cobbles look-alikes
Sedimentary, Igneous, or Metamorphic rocks (various types)
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Open the appSeveral rocks and minerals can be confused with River Cobbles. 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
Pebbles
Clastic Sedimentary Particle (Pebble-sized)
Also known as: Fluvial Pebbles
Boulders
Clastic Sedimentary Particle (Boulder-sized)
Also known as: Fluvial Boulders
Glacial Till
Diamicton
Also known as: Boulder Clay
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