How would one distinguish between an amygdaloidal basalt and a porphyritic basalt?
Answer to relevant QuestionsVolcanoes are classified as active, dormant, or extinct. If they have erupted during the last 50 years, they are clearly classified as active. On what bases are dormant or extinct volcanoes classified, and how can geologists ...How do geologists determine whether hot ash flows (glowing avalanches) were minor or major events?What minerals commonly fill vesicles to form amygdules as in Fig. 3.10?Joints, or cracks in rocks, are natural passageways for air and water. What should happen to joints with time? See Fig. 4.2.Explain hydrolysis.
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