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Chapter 10

Concept #1 Quiz

Concept #1 Quiz

Choose the best possible answer to the following questions about Key Concept 1 "Structural Geology – The study of Earth’s geometry and its evolution."

This activity contains 5 questions.

	Why is the discovery of fossils of marine organisms at the top of a tall mountain indicative of tectonic activity?   The marine organisms must have lived in sediment in rivers on the side of the mountain, therefore the rocks they are in must be transported to the oceans. The marine organisms must have lived at the beach, but the ocean water lowered leaving the mountain behind. The marine organisms must have lived in ocean sediment, therefore the rocks they are in have been faulted and folded into their current position. The marine organisms must have lived at the top of the mountain, therefore the rocks they are in must have formed from sediment from the top of the mountain.

	Which of the following is an example of what a “structural geologist” does NOT study?   the architecture of Earth’s crust and how it got that way how and why rocks deform, and the forces and stresses involved the orientations of faults and folds the evolution of a sedimentary basin, and identification of the sediment supply

	How is studying rock structures connected to economic importance?   Minerals of value to collectors and jewelers are found only within structures like faults. Oil and natural gas are usually found trapped within appropriate structures like folds. Utilities controllers pay geologists large sums of money to detect the presence of fractures. Groundwater flows along faults and joints, therefore frost wedging is prevalent in areas of lots of faults.

	What about structural geology has to do with construction of a skyscraper or bridge?   Understanding the orientation of fracture surfaces must be known since fractures are zones of weakness in rocks. Large buildings and bridges cannot be built on any geologic structure or it will not stand for more than a few years. The geometry of structures must be reflected by the building or bridge. Earthquakes occur where the largest buildings and bridges are built.

	Which of the following is NOT a list of structures or topics studied by a structural geologist?   the rock cycle and magma stress and mountain-building processes deformation and strain recorded in rocks faults and folds in rocks fractures and joints in outcrops

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