pebble

Also known as pebble rock

thumb|upright=1.35|Close view of pebbles

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Wikidata facts

Diameter: 64
Image: Five Pebbles.jpg

Show 3 more facts

Commons gallery: Pebble
Commons category: Pebbles
exact match: purl.obolibrary.org/obo/ENVO_00002139

Sources (2)

via Wikidata · CC0

~5 min read

Article

9 sections

Contents

Location
Beach
Inland
Human use
Mars
Gallery
See also
References
External links

thumb|upright=1.35|Close view of pebbles

A pebble is a clast of rock with a particle size of based on the Udden-Wentworth scale of sedimentology. Pebbles are generally considered larger than granules ( in diameter) and smaller than cobbles ( in diameter). A rock made predominantly of pebbles is termed a conglomerate. Pebble tools are among the earliest known man-made artifacts, dating from the Palaeolithic period of human history.