Fact 1: When a river floods , that river deposits soil in flood plains.

Fact 2: Soils are largely composed of silicate minerals.

Given the two facts above, answer the question "what does a river deposit into flood plains when it floods?" with the following options: 
- wildlife
 - silicate minerals
 - carbon dioxide
 - objects that have mass
 - swamp vegetation
 - salt and water.
 - limestone
 - Calcium carbonate


 

  silicate minerals       