1. Rock materials that are found in soil are mainly sand, silt and clay.
It is more accurate to say it is formed from clay and silt.
clay,sand,silt,and loam
clay
gravel,coarse,fine sand,silt and clay
The difference is that clay is smaller than silt, and clay is sticky, while the silt is loose and feels silky.
silt because there is a specific oder these substances go in order by. This goes from greatest mass to least mass: sand, silt , clay
Clay
Clay is less than 0.002 silt is 0.002 to 0.05 and sand is 0.05 to 2in
suspensions
silt
clay.