Editing Gravel (section)

==Types==
[[File:Varieties of Gravel in different shapes and size. 01.jpg|thumb|upright|Naturally occurring sedimentary gravel bed]]
[[File:Gravel small stones.jpg|thumb|Graded mechanically [[crushed stone]], with particle sizes roughly between 5 and 15 mm]]

Different varieties of gravel are distinguished by their composition, origin, and use cases. Types of gravel include:

;Bank gravel: naturally deposited gravel intermixed with sand or [[clay]] found in and next to rivers and streams.  Also known as "bank run" or "river run".{{sfn|Jackson|1997|loc="bank gravel"}}
;Bench gravel: a bed of gravel located on the side of a valley above the present stream bottom, indicating the former location of the stream bed when it was at a higher level. The term is most commonly used in [[Alaska]] and the [[Yukon Territory]].{{sfn|Jackson|1997|loc="bench gravel"}}
;[[Crushed stone]]: rock crushed and graded by screens and then mixed to a blend of stones and fines. It is widely used as a surfacing for roads and driveways, sometimes with [[tar]] applied over it. Crushed stone may be made from [[granite]], [[limestone]], [[Dolomite (rock)|dolomite]], and other rocks. Also known as "crusher run", DGA (dense grade aggregate) QP (quarry process), and shoulder stone.<ref>{{cite web|url=http://www.braenstone.com/crushed-stone/quarry-process-qp-dga/|title=Quarry Process – QP, DGA – NJ, NY, NYC, PA|website=braenstone.com|access-date=1 May 2014|archive-date=27 January 2018|archive-url=https://web.archive.org/web/20180127202621/https://www.braenstone.com/crushed-stone/quarry-process-qp-dga/|url-status=dead}}</ref> Crushed stone is distinguished from gravel by the U.S. Geological Survey.<ref name=USGS/>
;Fine gravel: gravel consisting of particles with a diameter of {{convert|2 to 6.3|mm}}<ref name=ISO/>
;[[Lag deposit|Lag gravel]]: a surface accumulation of coarse gravel produced by the removal of finer particles.
;Pay gravel: also known as "pay dirt"; a nickname for gravel with a high concentration of gold and other precious metals. The metals are recovered through [[gold panning]].
;Pea gravel: also known as "pea shingle" is clean gravel similar in size to garden [[peas]].{{sfn|Jackson|1997|loc="pea gravel"}} Used for concrete surfaces, walkways, driveways and as a substrate in home aquariums.
;Piedmont gravel: a coarse gravel carried down from high places by mountain streams and deposited on relatively flat ground, where the water runs more slowly.{{sfn|Jackson|1997|loc="piedmont gravel"}}
;Plateau gravel: a layer of gravel on a plateau or other region above the height at which stream-terrace gravel is usually found.{{sfn|Jackson|1997|loc="plateau gravel"}}
;Shingle: Coarse, loose, well-rounded, waterworn, specifically [[alluvial]] and [[beach]], sediment that is largely composed of smooth and spheroidal or flattened pebbles, cobbles, and sometimes small boulders, generally measuring {{convert|20 to 200|mm}} in diameter.{{sfn|Jackson|1997|loc="shingle"}}