How gravel, sand, silt and clay are formed?
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Sediment is material eroded off other rocks that is then worn down into pieces ranging in size from microscopic particles to pebbles to boulders. It is often carried from its source—the rock or mineral deposit it was eroded from—by wind or water and deposited in other areas, sometimes hundreds of miles away.
Many sedimentary rocks are formed when layers of sediment are buried under more layers of sediment and then pressed together by the weight from above. Sometimes, the sediment is cemented by minerals and other materials.
Common sediments in Kansas:
Sand—rock fragments or mineral particles that range in diameter from about 1/16 to 2 mm (from 0.002 to 0.08 inches).
Silt
Silt is a sediment material with an intermediate size between sand and clay. Carried by water during flood it forms a fertile deposit on valleys floor. The particle size of silt ranges from 0.002 and 0.06 mm.Silt is a non plastic or low plasticity material due to its fineness. Due to its fineness, when wet it becomes a smooth mud that you can form easily into balls or other shapes in your hand and when silt soil is very wet, it blends seamlessly with water to form fine, runny puddles of mud.
Gravel—chipped or rounded rock fragments that typically range in diameter from about 3 to 75 mm (0.125 to 3 inches).
Clay—a very fine grained material composed mainly of flakes from a variety of minerals weathered off rocks and mineral deposits. Clay particles are microscopic in size (less than 1/256 mm, or 0.00015 inches, in diameter
Many sedimentary rocks are formed when layers of sediment are buried under more layers of sediment and then pressed together by the weight from above. Sometimes, the sediment is cemented by minerals and other materials.
Common sediments in Kansas:
Sand—rock fragments or mineral particles that range in diameter from about 1/16 to 2 mm (from 0.002 to 0.08 inches).
Silt
Silt is a sediment material with an intermediate size between sand and clay. Carried by water during flood it forms a fertile deposit on valleys floor. The particle size of silt ranges from 0.002 and 0.06 mm.Silt is a non plastic or low plasticity material due to its fineness. Due to its fineness, when wet it becomes a smooth mud that you can form easily into balls or other shapes in your hand and when silt soil is very wet, it blends seamlessly with water to form fine, runny puddles of mud.
Gravel—chipped or rounded rock fragments that typically range in diameter from about 3 to 75 mm (0.125 to 3 inches).
Clay—a very fine grained material composed mainly of flakes from a variety of minerals weathered off rocks and mineral deposits. Clay particles are microscopic in size (less than 1/256 mm, or 0.00015 inches, in diameter
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