Exam 6: Sedimentary Rocks

The geologist's technical term for a fossilized piece of excrement is a ________.

An internal mould is a fossil replica of the inside surface of a shell that had filled with mud or mineral cement like calcite or silica.

Clays and muddy sediments lithify to form shales and mudstones.

What economic value do shales have, such as the Queenston Formation below the Niagara escarpment?

A horizontally bedded succession of thick, well sorted sands, containing moderately dipping layers between the flatlying upper and lower surfaces of each bed are called ________.

Travertine is a specific form of what common mineral?

Which variety of limestone consists mainly of sand-sized, mostly spherical grains of calcium carbonate precipitated in shallow, marine waters?

Which of the following minerals are listed in order of increasing solubility in seawater (from least soluble to most soluble)?

How is chalk formed?

Of sedimentary rocks, what proportion are sandstones?

Wackes are typically better sorted than sandstones lithified from ancient beach sands.

Clastic particles in a sedimentary breccia are rounded and are about the same size as fine-grained sand.

Nonclastic textures are most common in which of the following sedimentary rocks?

Shales are distinguished from other mudrocks by their ________.

What is the global carbon cycle?

During transport, currents of water or air sort sedimentary particles by their grain sizes.

The type of diagenesis that occurs in the transformation of aragonite to calcite is ________.

A fossil shell is filled with mud.The shell dissolves, leaving an impression of its inside surface on the shell-filling lump of mudstone.What type of fossil is this?

Detrital sedimentary rocks are mainly classified (named)on what basis?

What kinds of sediments initially form as solid masses of intergrown crystals?