Beneath a 500-million-year-old lava flow is a 3-m-thick regolith of decayed rock fragments, red iron oxides, and cation-deficient clay minerals. Why is the geology student who discovered this excited about his discovery?
Answer to relevant QuestionsWhat is base level?What is the angle of repose (the steepest angle at which a pile of sand will stand) of loose dry sand?Briefly describe the Gros Ventre landslide that occurred in 1925 near Jackson Hole, Wyoming.See Fig. 8.6. Your good friend has the opportunity to buy this riverside land in a beautiful canyon at good price. She wants to build a log cabin on the site. Knowing some geology, what should you tell her?Compared to rivers, do these thin sheets of water contribute significantly to erosion?
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