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.
â¢ GRADE (noun) The noun GRADE has 9 senses: 1. a body of students who are taught together. 2. a relative position or degree of value in a graded group. 3. the gradient of a slope or road or other surface. 4. one-hundredth of a right angle. 5. a degree of ablaut.