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Silt and clay size sediments form shale.
it means increase i the size of shale due to hydration.
It depends on how you are defining the word 'soft'. Quartzite is the hardest and most durable of the three - no question there. Shale can be crumbled with the tap of a hammer. Some loosely cemented sandstone can be crumbled when squeezed hard enough with your hand and some is well cemented and quite hard.
Silt refers to a sediment of a certain size. Sediment can be of any size particle which has been deposited.
Shale is composed of the smallest particles of other rocks.
Silt and clay size sediments form shale.
Silt and clay size sediments form shale.
it means increase i the size of shale due to hydration.
It depends on how you are defining the word 'soft'. Quartzite is the hardest and most durable of the three - no question there. Shale can be crumbled with the tap of a hammer. Some loosely cemented sandstone can be crumbled when squeezed hard enough with your hand and some is well cemented and quite hard.
Silt refers to a sediment of a certain size. Sediment can be of any size particle which has been deposited.
1/256mm, which is 3.9um
Siltstone is a sedimentary rock which has a grain size in the silt range, finer than sandstone and coarser than claystones.DescriptionSiltstone is a clastic sedimentary rock. As its name implies, it is primarily composed (greater than 2/3) of silt sized particles, defined as grains 1/16 - 1/256 mm or 4 to 8 on the Krumbein phi (φ) scale. Siltstones differ significantly from sandstones due to their smaller pores and higher propensity for containing a significant clay fraction. Although often mistaken as a shale, siltstone lacks the fissility and laminations which are typical of shale. Siltstones may contain concretions. Unless the siltstone is fairly shaly, stratification is likely to be obscure and it tends to weather at oblique angles unrelated to bedding. Mudstone or shale are rocks that contain mud, which is material that has a range of silt and clay. Siltstone is differentiated by having a majority silt, not clay.
Shale is composed of the smallest particles of other rocks.
SmallestshalesiltstonesandstoneconglomerateLargest
loess.
Rocks don't come in particular sizes. Shale is a type of rock - it can be as small as a grain of sand or as large as a mountain range
Shale is a sedimentary rock formed from extremely fine grains of mud. They are typically about 0.004 mm in diameter.