Sediments are substances that are transported and deposited by the agents of weathering (Wind, Ice, Water) due to erosion or the breaking down of rocks (weathering).
Sediments can also be used to refer to organic matter such as microorganisms or mineral substances.
Sediment deposition can be defined as the process whereby sediments transported by wind, ice or water are laid down at a particular area.
As the velocity of water transporting sediments are reduced, heavy sediments are deposited.
Three scientists are credited with the development of cell theory. Matthias Schleiden observed that all plants were made of cells; Theodor Schwann observed that all animals were also made of cells; and Rudolf Virchow observed that cells only come from other cells.
