Presents photographs of examples of clastic, chemical, and organic sedimentary rocks, with short descriptions underneath each rock image. Each rock name is also linked to its own dedicated page with a great deal of additional information...

[Free Registration/Login may be required to access all resource tools.] Describes how sediments weather, erode, and are deposited in a sedimentary environment.

Learn about the formation of sedimentary rocks.

An upper-level explanation of clastic sedimentary rock classification. Charts, diagrams, and review questions are included. Be sure to click on the PDF Clastic Identification key.

[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key points about how sedimentary rocks are classified. Includes a few questions to check for understanding.

[Free Registration/Login may be required to access all resource tools.] Explains that sedimentary rocks are classified by how they formed and by grain size.

Sedimentary rock forms in layers that are deposited one after the other over long periods of time. Oftentimes, sedimentary rock contains fossils and other debris that are deposited within the layers. Use this experiment to investigate...

Did you know the rock cycle is a continuous cycle that takes hundreds of millions of years? This webpage explains how sedimentary, metamorphic, and igneous rocks are formed. It also gives examples of each type of rock. Also includes a...

Students act out a type of rock, igneous, sedimentary, or metamorphic, for others to guess.

Classify rocks and minerals according to their characteristics.

Fourth graders identify rock types by observing key characteristics.

Welcome to Devil's Tower National Park in Wyoming! This highly interactive website reveals the geological processes behind the formation of this unique natural structure.

Explore the differences between minerals and rocks.

Create dinosaur tracks using clay then write a story.

Activity demonstrates two ways fossils are formed.

Learn how fossils are created.

Find out how rocks and rock layers change with erosion and weathering.

[Free Registration/Login may be required to access all resource tools.] Summarizes the key points about how the three types of rocks form and convert from one to another. Includes a few questions to check for understanding.

Explains what is meant by the deposition of sediments by wind and water and provides examples of the resulting landforms.

Consider the different sizes of sediment when studying fossils.

Learn about the types of rocks where fossils can form.

What are rocks? Learn about the different types of rocks and how they are formed.

Explains how rocks are classified into three basic groups.