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Sedimentary Rocks
There are a lot of processes that cause rocks to break apart into smaller
pieces. No matter what causes the rock to break, we call the smaller pieces
Water, wind, and gravity are the main things that move pieces of rock from
place to place. Sediment may get transported thousands of miles by one of
the world's major rivers, or it may just go from the top of the hill to the
bottom during a landslide
New sediment acts like a blanket for old sediment-sediments get buried by
other sediments
Sediment can include minerals, small pieces of plants and other organic
The sediment is compressed over a long period of time before consolidating
into solid layers of rock.
Sedimentary rocks forms layers called strata which can often be seen in
exposed cliffs.
Sedimentary rocks cover the majority of the Earth's rocky surface but only
make up a small percentage of the Earth’s crust compared to metamorphic
and igneous types of rocks.
Examples of sedimentary rocks include limestone, sandstone, mudstone,
greywacke, chalk, coal, claystone and flint.