GO IN DEPTH

How Sedimentary Rocks are Formed

Introduction

Rocks can seem very durable. It’s hard to believe that they can change. But rocks take different forms at different times. The process by which this happens is called the Rock Cycle. In this activity, you will learn about how, as part of the rock cycle, one type of rock (called sedmimentary rock) is formed.


Exploration

Take a look at the rock cycle diagram found on The Rock Cycle page.

Now view some photographs of Petra stone structures by going through the slideshow at the top of this page.

How are the stripes of sedimentary rocks formed?
Read the article Stratification And Segregation: Why Does Some Sandstone Have Stripes? Your teacher may have printed a copy for you. If not, you can read it online or print out a copy. As you read the article, take notes in the following format:

Fold a piece of lined paper in half vertically. Label the left side of the paper, "Information about Sedimentary Rocks". In this column you will record a bulleted list of notes from the article. On the right side of the paper, you will draw a picture/diagram that illustrates just one concept from the left column (your teacher may choose the concept to be drawn).

Once again, access the article, Stratification And Segregation: Why Does Some Sandstone Have Stripes? This time, go to Digging Deeper and get some more information about sedimentary rocks. Now go to Hernán Makse's Home Page to read about the background of this scientist.


Knowledge Check

Once again, look at the Images of Petra. As you look at the photographs, think about this question: How are the stripes of sedimentary rocks formed? Formalize your thoughts and be prepared to share them with your class or in written form.

Assignment: Write a short reflection on how this lesson helped you better understand how sedimentary rocks are formed. Your response should be specific and cite information learned in this lesson.


This esheet is a part of the How Sedimentary Rocks are Formed lesson.

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AAAS Thinkfinity