Exam 6: Pages of Earths Past: Sedimentary Rocks

Clastic sedimentary rocks are primarily classified on the basis of ____________.

The thickest sequences of sedimentary rocks are typically found in ____________.

If water is the transport medium of sediment,the grain size of sedimentary deposits most closely indicates the ____________.

It is unusual for ____________ to carry grains larger than sand.

Of the grains above,which possesses greater sphericity?

A well-sorted sandstone with asymmetric ripples was most likely deposited as sand ____________.

A sandstone with a large proportion of feldspar due to the physical weathering of granite is more precisely termed a(n)____________.

The difference between breccia and conglomerate is that conglomerate ___________.

Unlike physically precipitated chert,biochemical chert ____________.

Biochemical limestones are dominated by carbonate mud and fragments of ____________.

The smallest detrital grains are ____________.

As compared with metamorphism,diagenesis ____________.

Geologically,medium-sized sediment refers to ____________.

The removal of detritus from weathered rock at an outcrop is termed ____________.

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

Physical precipitation of gypsum due to evaporation of seawater produces which kind of sedimentary rock?

Which type of sediment settles at greater fluid velocities than sand?

Grains become rounded primarily during ____________.

A clastic rock comprised of sand-sized grains derived from the physical weathering of granite and containing a sizable proportion of feldspar is termed ____________.

Sea level rises locally,and marine sediments are deposited on top of terrestrial sediments during events termed ____________.