Pebble

Scientific Name: N/A

Category: rock

Pebble

Brief Description

A small, rounded stone held in a hand, smoothed by weathering and water action.

Characteristics

Small size, generally between 4 and 64 millimeters, with a smooth, water-worn texture and reddish-purple or brownish coloration.

Habitat

Found abundantly along riverbeds, beaches, lake shores, and glacial till deposits.

When to Find It

N/A

Conservation Status

N/A

Ecological Role

Pebbles and gravel beds provide essential microhabitats for aquatic macroinvertebrates, fish spawning sites, and help stabilize riverbanks and shorelines.

Easily Confused With

Cobbles and boulders, which are simply larger categories of rock fragments based on size.

Observation Tips

Look along dry riverbeds or shorelines after heavy rain when water levels recede to find uniquely colored or weathered stones.

Interesting Facts

The rounding of pebbles occurs through the process of attrition, where rocks collide with each other as they are transported by water or wind over long periods.