Take a look at the rock cycle diagram found on the Nebraska Rocks and the Rock Cycle page.

Now view some photographs of Petra stone structures by visiting, Images at Petra.

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).

Check in with your teacher before continuing.

Once again, access the article, Stratification And Segregation: Why Does Some Sandstone Have Stripes?, and click on the Hernan Makse link toward the bottom of the article to read about the background of this scientist.

Once again, look at the Images at Petra. As you look at the photographs, think about the following 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.