Gravel r v l is a loose aggregation of rock fragments Gravel is classified by particle size range and includes size classes from granule to bouldersized fragmentsIn the UddenWentworth scale gravel is categorized into granular gravel 24 mm or 00790157 in and pebble gravel 464 mm or 0225 in ISO 14688 grades gravels as fine medium and coarse with ranges
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