Most sediment is formed by _________.
settling out of a fluid
Probably the single most characteristic feature of sedimentary rocks is________.
layers
Why do most sediments end up being deposited in oceans instead of other parts of the Earth?
Because running water is the most important way to transport sediment and it is the lowest areas of the planet, usually large.
Explain why sedimentary rocks are particularly important in studying the past history of the Earth.
Because studying what happens at the coast, in rivers, or in the desert can help people figure out how landscapes change and sedimentary rocks and fossils are formed.
Which of the following is an economically important sedimentary rock?
coal
Which of the following pairs are likely products of weathering granite?
clay and quartz
Which of the following is not a product of the chemical weathering of potassium feldspar?
iron oxide
Detrital sedimentary rocks are typically classified on the basis of their _________.
particle size
Breccia, a rock with angular particles, is likely to have traveled _________.
only a short distance
When sand lithifies, the resulting tock is commonly called _________.
sandstone
The most common sedimentary rock is ___________.
shale
Silts and clays are commonly deposited in lakes, lagoons, swamps, and marine environments because __________.
those settings have relatively still water
Chemical sedimentary rocks form from materials _________.
carried in solution
Limestone is formed primarily through __________.
biochemical sediments secreted by marine organisms
Chalk forms from _________.
the hard parts of microscopic organisms that accumulate on the sea floor
Which one of the following is not related to chemical weathering?
frost wedging
Chemical weathering would be most effective __________.
in a warm, humid climate
Death Valley is a site where _________sedimentary rocks are common.
evaporative
An important condition for the formation of coal is __________.
incomplete decomposition of organic matter due to a lack of oxygen
Which rock type is associated with a high-energy environment (such as a very turbulent stream)?
conglomerate
Detrital sediments would predominate in all of the following environments except _________.
salt flat
Compaction would probably be most significant as lithification process for ____________.
shale
The most abundant chemical sedimentary rock is ____________.
limestone
Which of the following best describes bedded gypsum and rock salt?
evaporates; chemical, sedimentary rocks
Coal beds originate in __________.
freshwater coastal swamps and bogs
The common source of pressure during compaction of sediments is __________.
the weight of the sediments deposited above the compacting sediments
Which word does not fit the pattern?
lithification
Rock salt and rock gypsum are common examples of a group of chemical sedimentary rocks called ___________.
evaporities