Objectives - Chapter 3
Distinguish between magma and lava.
Describe how the rate of cooling and mobility of ions influence the sizes of crystals in igneous rocks.
List fine different igneous rock textures and explain their origins.
Use rock texture and the physical appearance of an igneous rock to infer basic facts about the origin of the rock.
Describe the Bowen’s Reaction Series.
Describe the processes by which a single magma can produce several types of igneous rocks.
Contrast granitic, andesitic and basaltic compositional groups and list the fine-grained and coarse-grained rocks representative of each group.
Use Figure 3.4 to help classify igneous rocks, and to distinguish the mineralogy and general chemical composition of different igneous rocks.
Use Appendix B and/or the flow chart given in class to identify igneous rocks.
Classify intrusive bodies based on the criteria discussed on pages 59-63.
Describe the tectonic settings in which different igneous rocks are likely to form.
Explain how pressure, water and mineral mixing affect melting temperatures of magmas.
Define and understand the “Terms to Remember” on page 73.