Exam 7: Sediment and Sedimentary Rocks

Sedimentary deposits formed by wind tend to be very ____________________ sorted.

A sedimentary rock with gravel-sized particles that are angular is a _______; a sedimentary rock with rounded particles is a _______.

How are oil and gas trapped in rock strata? What are these traps called?

What can mud cracks tell us if we find them preserved in ancient rocks?

What are some ways in which fossils are useful?

What does poorly-sorted sediment have?

What are some of the characteristics of sedimentary rocks that are used in determining the depositional environment represented by a facies?

Describe how compaction lithifies sediments.

What makes up a chemical sediment?

Graded beds refer to sedimentary beds that show an increase in grain size from bottom to top.

A vertical sequence of a(n)____________________ facies records the landward advance of the sea.

What is an example of an evaporite sedimentary rock?

What are some examples of sedimentary structures?

What are the properties used to describe detrital sediment?

A vertical sequence of regressive facies shows _______ facies superposed on _______ facies.

Briefly explain how dolostone is formed.

A detrital rock that is made mostly made of quartz sand is called arkose.

Sediments are classified as ____.

A rock composed almost entirely of fragmented seashells is called

What two sedimentary structures can be useful in determining paleocurrent directions?