How is siltstone formed?

Question

I know it is formed in the same way as sandstone, but HOW?

Answer 1

As the sediments pile up, the oldest ones are buried deeper and deeper. When they are buried deep enough, heat and pressure and other workings of the earth make the soft sediments hard, and turn them into rock. This is called "lithification", and sediments that have become hard are said to be "lithified".

SANDSTONE is formed when sand-sized sediments are turned into rock, SILTSTONE is formed when silt-sized sediments are turned into rock, and SHALE is formed when the tiniest mud-sized sediments are turned into rock.

Answer 2

How Is Siltstone Formed

Answer 3

Less energy is needed to move silt grains than the bigger, heavier, sand grains. So a weak current/wind can pick up silt grains but not sand grains, and carry the silt grains along together. Similarly but in reverse, as a strong current/wind dies down, sand grains will fall out first, and silt grains will be carried further before they fall out.

So you can go to many places today where the sediment under your feet is silt, whereas in other places it might be sand. Like for example, on many beaches you will find sand or pebbles. But if you go a long long way, many miles, offshore and dive down, you will find silt. In rivers, you might find sand-bars, formed by the strongest currents, but step away from the sand-bars and there is silt.

Like sandstone, siltstone forms when the sediment is buried and subjected to a lot of heat and pressure, causing cementation.

Answer 4

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RE:
How is siltstone formed?
I know it is formed in the same way as sandstone, but HOW?

Answer 5

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the siltstone is exposed to massive amounts of heat and pressure, where the constituents recrystallize, reorganize themselves and undergo metamorphism. It first is changed to slate, then phyllite, schist and finally gneiss

Answer 6

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