Unit 6 Sedimentary Rocks Review Quiz

Cemented shells of marine organisms form which kind of sedimentary rock?

• biochemical

• chemical

• clastic

• organic

Which environment would most likely produce sedimentary deposits characterized by very well-sorted, very well-rounded grains that are nearly pure quartz?

• river

• glacier

• beach

• alluvial fan

Compaction and cementation of grains occurs during __________.

• erosion

• lithification

• transport

• weathering

If a geologist found preserved mud cracks, he or she could conclude that the environment in which they formed __________.

• was once covered in wet mud

• was once covered by a glacier

• has been subjected to a major climate change event

• was the site of a mass extinction event

Geologists call individual layers of sedimentary rocks __________, whereas several of them together are called __________.

• beds; strata

• strata; beds

• laminations; graded beds

• graded beds; laminations

The primary difference between breccia and conglomerate is that conglomerate __________.

• is finer-grained than breccia

• is coarser-grained than breccia

• possesses more angular grains than breccia

• possesses more rounded grains than breccia

Two major sources of energy, coal and oil shale, are considered __________ sedimentary rocks.

• clastic

• biochemical

• organic

• chemical

The majority of the rocks that form at the surface of the Earth are __________.

• intrusive igneous rocks

• foliated metamorphic rocks

• sedimentary rocks

• nonfoliated metamorphic rocks

Chemically precipitated limestone that forms in caves or around hot springs is termed __________.

• agate

• dolostone

• jasper

• travertine

Sedimentary rocks are most likely to form __________.

• near the Earth's surface

• in high-temperature conditions

• in high-pressure conditions

• in the upper mantle.