sedimentary
Sedimentary rock. It forms when layers of sediment pile up.
Sediment rocks
Reverse Grading.
Sedimentary rocks are made from particles called sediment. They are made from layers of sediment (small particles) on the bottom of rivers or seas. The sediments are compressed as more layers build on top of them. The particles then become cemented together to form solid rocks. The layers of rock are called strata. Sedimentary rocks have a grainy structure and they easily crumble.
Crust
As more sediment is added, it is compressed and hardens into rock layers.
:D
The oldest layers of undisturbed sediment are at the bottom.
compaction
cementaion
Deposition
A rock composed of layers of sediment.
Deposition
Sedimentary rocks are formed by the accumulation of sediments.
It is sand. Edit: Over many thousands of years - sediment gets compressed and compacted into layers. The layers form rocks such as slate and coal.
compaction