Sedimentary rocks form from built-up layers of eroded rock and plant matter pressed together over time. At-level text and graphic organizers explore how the makeup of sediment, rock formation, and identifying different kinds of sedimentary rocks. Readers will also learn how fossils form in sedimentary rocks, and the role sedimentary rocks play in the rock cycle.

Includes index.

Pressed down -- What is sediment? -- Forming layers -- Clastic rock -- Biological rock -- Clues to the past -- Fossils in rock -- Fueling our world -- Part of the cycle.