A lot of rocks have sat in water at one time or another, and flowing water erodes minerals, giving rocks a smooth, rounded shape over time.
Weathering, which is breaking of rock into smaller pieces, works to round exposed edges of rock by chemical weathering from naturally acidic rainfall and through physical weathering such as particle abrasion and rock tumbling due to the transport of material by wind, water, ice, and gravity (erosion).
A sedimentary rock made up of rock fragments with rounded edges is called a conglomerate. This type of rock typically forms from the accumulation of rounded pebbles or boulders that have been deposited and cemented together over time.
A weathered rock is a rock that has been broken down or altered by processes such as wind, water, and temperature changes over time. This weathering can cause the rock to become smoother, rounded, or even break apart into smaller pieces.
Conglomerate rock would be formed by the compaction and cementation of rounded pebbles.
congolmerate
A nugget is gold that has weathered out of rock. Resistant to weathering, but malleable, the gold weathered from rock will tend to become rounded, taking the shape of a nugget. Although gold can be found in association with existing rock in situ, it will not have the characteristic rounded shape of a nugget.
Sedimentary rocks are formed from the rock fragments that are made when a rock is eroed. Theese rock fragments are transported (carried away) from the rock face, usually by streams or rivers. As they are transported by the water, the rock fragments knock against each other and wear away. When they become very small they are called grains
Weathering, which is breaking of rock into smaller pieces, works to round exposed edges of rock by chemical weathering from naturally acidic rainfall and through physical weathering such as particle abrasion and rock tumbling due to the transport of material by wind, water, ice, and gravity (erosion).
A conglomerate, classified by rounded rock fragments larger than 2cm compacted and cemented into a rock.
No. Although the movement of rocks may assist in their reduction in size, the weathering that occurs will tend to produce rounded edges.
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Erosion and weathering will cause rocks to become rounded.
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They fragment and become jagged, they become rounded by means of water erosion, which is why rounded rocks are found by rivers, creeks, etc.
A sedimentary rock made up of rock fragments with rounded edges is called a conglomerate. This type of rock typically forms from the accumulation of rounded pebbles or boulders that have been deposited and cemented together over time.
A weathered rock is a rock that has been broken down or altered by processes such as wind, water, and temperature changes over time. This weathering can cause the rock to become smoother, rounded, or even break apart into smaller pieces.
Conglomerate is one of two similar rocks not to be confused. The large 'grains' are rounded as a result of their formation, and indeed the formation of the rock. Conglomerate is not to be confused with Breccia, a similar rock formed in very different circumstances. Breccia fragments tend to be smaller, but most of all are always angular.