Silt. Silt is granular material of a size somewhere between sand and clay whose mineral origin is quartz and feldspar. Silt may occur as a soil or as suspended sediment in a surface water body. It may also exist as soil deposited at the bottom of a water body.
In North America, a grade-separated junction may be referred to as a grade separation or as an interchange â in contrast with an intersection, at-grade, a diamond crossing or a level crossing, which are not grade-separated. 1 Effects.
Definition of intersection for Students. 1  1 : the act or process of crossing or passing across the intersection of line A and line B. 2  2 : the place or point where two or more things (as streets) meet or cross each other. 3  3 : the set of mathematical elements common to two or more sets.