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...

You may have heard the expression, "You can't get blood from a stone." But what about oil? Can you get petroleum oil from a stone? In this geology science fair project, you'll find out what kinds of stones make the best storage rocks for...

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.

In-depth resource for identifying rocks. Includes an interactive rock identification key to help you figure out the name of your rock.

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.

Activity demonstrates two ways fossils are formed.

Learn how fossils are created.

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

Explains what stromatolites are, their formation from colonies of cyanobacteria, their evolutionary importance, and where they can be found living today. Thrombolites are similar to stromatolites but form differently. They can also still...

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.