This 23-page slideshow explains what intrusive and extrusive igneous rocks are and the characteristics of their structures. Each type of structure is accompanied by one or more images. (Website for Mining Engineering students at Mehran...

What is igneous rock? How is it formed? What makes igneous rock different from sedimentary rock or metamorphic rock? This interactive OLogy card answers these and similar questions.

This resource provides a description of igneous rock, its origin and the types of rock that are formed from a volcanic eruption.

A slideshow, a karaoke song to sing along to, and a short multiple-choice quiz on the topic of igneous rocks, how they are formed, and some different types.

Rocks hold the history of the earth and the materials that will be used to build its future. This website holds a treasure of information regarding igneous, metamorphic and sedimentary rocks.

In this interactive tutorial you will learn about the types, forms, and hazards of volcanoes. The types of landform common to volcanic activity is discussed. Then, the landforms commonly resulting from intrusive igneous activity are...

[Free Registration/Login may be required to access all resource tools.] How to classify igneous rocks.

[Free Registration/Login may be required to access all resource tools.] Determination of intrusive and extrusive igneous rocks.

[Free Registration/Login may be required to access all resource tools.] Factors that determine the composition of an igneous rock.

[Free Registration/Login Required] An interactive animation demonstrating how the mineral crystal in an igneous rock formed due to the cooling magma. Site also includes a short quiz on the formation of the crystal.

Students use samples of four different types of igneous rocks to observe differences in texture, color, and grain size, and then make inferences about the relative cooling histories and silica content associated with each magma type.

This lesson will present how to identify and classify igneous rocks. It is 3 of 3 in the series titled "Geology: Igneous Rocks."

This lesson will present how to identify and classify igneous rocks. It is 2 of 3 in the series titled "Geology: Igneous Rocks."

This unit goes deeper into the knowledge of the three petro genetic environments: igneous, metamorphic and sedimentary. It includes 13 interactive activities.

igneous rock

A well-designed instructional activity on rocks where students first learn about how the three categories of rocks form (sedimentary, igneous, and metamorphic), then must examine the features of different rock samples, and determine...

igneous rock

A close up photo of a unique looking igneous rock set against a white background.

What are rocks made of? Where do rocks come from? What is an igneous rock? These are just some of the questions answered by the scientists of the U.S. Geologic Survey.

Test your knowledge of different types of rocks by taking a quiz. Determine if each picture shows an igneous, metamorphic, or sedimentary rock.

Introduce to the students the three main types of rocks and the processes that form them. Wax crayons are eroded into sediment, compacted into sedimentary rock, partially melted and pressed into metamorphic rock, and finally melted and...

This interactive tutorial on visualizing geologic features contains animated block diagrams that show how the surface expressions of dipping layers, folds, igneous intrusions, and faults are related to subsurface structure and cross...

A good resource if you want a quick overview of the formation process for igneous, metamorphic and sedimentary rock.

[Free Registration/Login Required] Students read about three different types of rocks: sedimentary, igneous, and metamorphic. A question sheet is available to help students build skills in classifying and categorizing.