Question 1
Red, brown, and yellow soil-coloring minerals originate by what process?
◦ precipitation of iron oxides from chemical weathering
◦ chemical weathering of quartz and feldspars
◦ mechanical weathering of very fine-grained, blue-gray clays
◦ mechanical weathering of the feldspars and micas in granite and rhyolite
Question 2
Which of the following best describes sets of fractures in relatively fresh bedrock, such as granite, that are roughly parallel to the land surface?
◦ hydrolytic failures
◦ columnar joints
◦ sheeting fractures
◦ thermal expansion cracks