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Indian Knoll is an archaeological site near the Green River in Ohio County, Kentucky that was declared to be a U.S. National Historic Landmark. [1]Excavations of Indian Knoll during the Great Depression [2]: 115 were conducted by archaeologists from the University of Kentucky as part of WPA economic recovery efforts. [3]
Yuhua stones, or pebbles, are of sedimentary origin and consist of minerals including quartz and other silicates. They are found in the Yangtze River , polished smooth by the action of water. [ 1 ] Colors include red, rose, yellow, green, and white.
River gravel is a name given to gravel composed of small pieces of rounded stone of various colors, usually no larger than a large coin. [1] It is named for the effect of many years of rounding of the edges of the stones due to a flow of water over it, as often takes place in a river . [ 2 ]
Gravel (largest fragment in this photo is about 40 mm (1.6 in)) Gravel (/ ˈ ɡ r æ v əl /) is a loose aggregation of rock fragments.Gravel occurs naturally on Earth as a result of sedimentary and erosive geological processes; it is also produced in large quantities commercially as crushed stone.
In Europe, sizing ranges are specified as d/D, where the d shows the smallest and D shows the largest square mesh grating that the particles can pass. Application-specific preferred sizings are covered in European Standard EN 13043 for road construction, EN 13383 for larger armour stone, EN 12620 for concrete aggregate, EN 13242 for base layers of road construction, and EN 13450 for railway ...
The seasonal deposits are extremely fertile and crucial to subsistence farming in the Amazon Basin along the river banks. Alluvium (from Latin alluvius, from alluere 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings.
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