Image: Wikimedia Commons

boulder

Natural rock fragment larger than 25.6 cm in diameter (larger than 200 mm diameter according to ISO 14688)

EntityQ581776

Also known as bowlder

Subclass of: rock fragment
1
Sources
1.vro.agriculture.vic.gov.au/dpi/vro/nthcenregn.nsf/0d08cd6930912d1e4a2567d2002579cb/2bb919f3b4210453ca25752700275e1e/$FILE/glossary.pdf
View statement on Wikidata ↗
, landscape element
Part of: lithosphere

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

In geology, a boulder is a rock fragment with size greater than 25.6 cm (10.1 in) in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In common usage, a boulder is too large for a person to move. Smaller boulders are usually just called rocks or stones.

Overview

All data

26 statements · 8% with external sources · numbers in brackets are citations

Main regulatory text: ISO 14688
OpenStreetMap tag: natural=stone
Unicode character: 🪨
Different from: Glaz
Permanent duplicated item: boulder
Diameter: 25.6 cm criterion used: minimum

On other databases

15 identifiers linking boulder across the web's reference databases

Data quality

statements

externally sourced

Source last edited November 3, 2026. AIDb refreshes this page daily.

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AIDb. (2026). boulder (Q581776). Retrieved from https://aidb.si/e/boulder-Q581776