Exam 7: Sedimentary Environments and Rocks

Observe the rocks and landscape in this photograph,which shows a sequence of layers.From the list of observations below,select those observations that you think are valid.Refer to the Chapter 7 Investigation in your textbook for descriptions of the rock units.

Which of the following environments is NOT a setting in which limestone forms?

If you were designing a rock that resisted weathering,which of the following characteristics would it have?

How does gypsum form?

These sandstone beds are interlayered with dark marine shales.What is the most likely environment in which the sandstone formed?

Which environment is least likely to deposit sand?

What type of weathering is best expressed in this weathered limestone?

This sandstone includes shells of marine creatures that live in shallow water.What is the most likely environment in which it formed?

Which of the following times indicates a transgression?

Which environment is least likely to deposit siltstone or shale?

What type of rock would you form in this environment,showing a dried up lake bed?

In this section,a lower gray rock is successively overlain by beach sandstone,lagoon mudstone,and limestone.What is the best interpretation of what was going on?

Which of the following can we understand by studying sedimentary rocks?

What type of rock is shown in this photograph?

Which of the following is most likely to deposit a conglomerate?

Does the change from the thick gray shale to the overlying sandstone indicate a transgression or a regression?

Which of the following environments would likely have large clasts?

Using the stratigraphic section and photographs located in the textbook (Chapter 7 Investigation),determine the environment of deposition for the dark gray shale (there is one correct answer).

Which of the rock layers in this figure was most likely deposited by sand dunes on land?

This photograph shows chert.How does it form?