What kind of igneous rock bodies are the light-colored rocks shown in Fig. 3.7?
Answer to relevant QuestionsA layer of granite 1 m thick is present in a sequence of sedimentary rocks, parallel to the bedding in the sedimentary rocks (Fig. 3.8). Is it a dike, a sill, or a stock?Igneous rocks are classified on the basis of texture (grain size) and composition (mineralogy). A general indicator of igneous rock composition is the color. Name the following igneous rocks by referring to Fig. 3.4:What are the rounded structures shown in Fig. 3.10?Figure 3.14 is a sketch of lava flows in the Columbia Plateau region of northwestern United States. What do the flows indicate about the viscosity and composition of the lava?What are the agents of mechanical weathering
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