Describes the characteristics and importance of sand, silt, and mud.

They might just seem like types of dirt, but young readers will soon recognize the importance of sand, silt, and mud in the rock cycle. Full-page photos, intrig

They might just seem like types of dirt, but young readers will soon recognize the importance of sand, silt, and mud in the rock cycle. Full-page photos, intrig

Discusses what sedimentary rocks are and explains how they are formed.

Sand, clay and rock have to be excavated for a variety of purposes, such as dredging, trenching, mining (including deep sea mining), drilling, tunnel boring and