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Exam 7: Sediment and Sedimentary Rocks

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Question 1

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Two examples of sedimentary structures are___________ ,___________ .

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any two of...

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Question 2

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Much of the uranium used in nuclear reactors comes from ancient stream channel deposits.

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Explain the basis for sedimentary rock classification using examples and rock names as necessary.

Why is quartz much more common than feldspar in sandstones?

The texture and composition of sedimentary rocks does not necessarily reflect

What materials comprise detrital sediment?

What is a less common but still important third cementing agent in sedimentary rocks?

Fossils are commonly found in igneous and metamorphic rocks.

What is the source of red, yellow and brown colors in weathered sedimentary rocks?

Much of the world's iron ore deposits come from rock known as

An example of a carbonate sedimentary rock is___________ .

Detrital sediments include any solid particles derived from weathering that are greater than silt-sized.

Stratigraphic traps occur when oil and natural gas are trapped by variations in the sedimentary rock strata.

Fossils are physical oddities of sediment lithification.

In addition to grain size, what other properties of the particles are used to describe detrital sediment?

For what two things is the Green River Formation known?

The degree of rounding and sorting is distinctive for different depositional environments.

The organic substance found in oil shale which can be processed into liquid oil and combustible gases is___________?

A vertical sequence of a (transgressive/regressive. ___________facies records the landward advance of the sea.

Given that sedimentary rocks are either detrital or chemical in origin, relate the classification system generally to the three major environments in which sediments are deposited.