Sedimentary Rocks Quiz 2025

Sedimentary rocks can form from the deposition of solid particles eroded from pre-existing rock or from the deposition of the hard parts of organisms.

• True

• False

Sediments are unconsolidated, which means the grains are separate and unattached to one another.

• True

• False

Clay is the finest sediment.

• True

• False

Boulders include all rounded particles coarser than 2 mm in diameter.

• True

• False

Lithification is the general term for the processes that convert loose sediment into a sedimentary rock.

• True

• False

Most sediment is transported some distance by gravity, wind, water or ice.

• True

• False

The environment of deposition is determined by the location in which deposition occurs.

• True

• False

Detrital sedimentary rocks form from cemented sedimentary grains that are fragments of a preexisting rock.

• True

• False

Sedimentary breccia is a sedimentary rock formed by cementation of coarse angular fragments of rubble.

• True

• False

A sandstone with more than 25% sand-sized feldspar is an arkose.

• True

• False