What are the rounded structures shown in Fig. 3.10?
Answer to relevant QuestionsHow would one distinguish between an amygdaloidal basalt and a porphyritic basalt?What could happen to the cities shown in Fig. 3.13 if any of the nearby volcanoes erupted?Note the columnar joints in igneous rocks in Figs. 3.14 and 3.17. What causes them to form, and how are they oriented relative to the shape of the body?Why is mechanical weathering so important to chemical weathering?Give a generalized chemical equation that illustrates the effect of carbonation on silicate minerals.
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