Nicolaus Steno observed and concluded about sediment in 1669 that the strata of the earth is accumulated particles that are deposited in time sequence in form of sedimentary layers.
The differ based on the kind of sediment that they are composed of, the color of their sediment, and the size of their sediment.
It is called sedimentation.
They initially are formed by moving water which arranges sediment in patterned formations. If the ripples in the sediment are covered with other sediments before being obliterated, or if the ripple marks dry, and are then covered with subsequent sediments, they may eventually be preserved in the rock strata.
Strata.
Layers or beds / bedding are other names for strata in geology.
Strata
The differ based on the kind of sediment that they are composed of, the color of their sediment, and the size of their sediment.
Sedimentary Rock. Strata is layers of sedimentary rock that form from the deposition of sediment.
Strata
...sedimentary rock is formed. OR ...strata is formed. Try either.
A bedding plane is the area of separation between rock strata made by a cyclical or situational deposition of sediment. Bedding planes are originally parallel to the horizon, but the strata inclination can be altered by crust moving events.
It is called sedimentation.
Strata - Strata album - was created on 2004-07-27.
As fluids and spaces between particles are squeezed out by the weight of overlying sediments, the particles become closer to each other, thus flattening the thickness of the strata.
They initially are formed by moving water which arranges sediment in patterned formations. If the ripples in the sediment are covered with other sediments before being obliterated, or if the ripple marks dry, and are then covered with subsequent sediments, they may eventually be preserved in the rock strata.
When there is a build up of unconsolidated sediment (like soil) on a surface, where the rock strata are not horizontal there is likely to be mass movement as the increased weight on the bedding plane increases the likelihood that the force acting will exceed the bond strength between the strata. This will cause the strata on top to move and thus is wearing down the surface of the earth. Any mass movement caused by gravity will also answer your question, but this is one example.
The plural for stratum is strata.