
The sequence of formation of features present in the accompanying image showing metamorphic rock gneiss, a basaltic dike and a fault with logic.

Answer to Problem 1GST
The sequence of formation of features present in the image from older to younger is Gneiss, dike, fault. Gneiss is metamorphic and must have formed before the dike, otherwise the igneous dike would have been metamorphosed also. The fault has split and separated the dike, therefore the dike must have formed before the fault occurred.
Explanation of Solution
“Principle of cross-cutting relationships states that the geological feature which cuts across strata is always younger than the one it cuts through it” A fault is a break or fracture in the rock, along which the displacement occurs.
According to the principle of cross-cutting relationship, the igneous dike is younger and formed after the metamorphic rock Gneiss that cuts through it. Gneiss is a high grade foliated metamorphic rock and must have formed before the dike, otherwise the dike would have been metamorphosed too. The fault has split and separated the dike, hence the igneous dike must have formed before the fault occurred.
Want to see more full solutions like this?
Chapter 9 Solutions
Earth: An Introduction to Physical Geology
- What are the primary effects of acid rain on terrestrial and aquatic ecosystems?arrow_forwardList the five primary air pollutants commonly released into the atmosphere and their sourcesarrow_forwardAs a nation, the United States provides many subsidies to make energy cheap because policymakers feel that economic development depends on cheap energy. If these subsidies were withdrawn or taxes on energy were added, what effect would this have on your own energy consumption? Would you be willing pay higher gasoline prices as in many European countries, if it would cut greenhouse gas emissions?arrow_forward
- List the six criteria air pollutants, their sources and their effects.arrow_forwardWhat common indoor air pollutants are you exposed to? What can you do to limit this exposure?arrow_forwardBased on the Climate-Change Censorship campaign article WSJ what circ of where "following the Science" has caused harm to human health or the environment?arrow_forward
- Applications and Investigations in Earth Science ...Earth ScienceISBN:9780134746241Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. TasaPublisher:PEARSONExercises for Weather & Climate (9th Edition)Earth ScienceISBN:9780134041360Author:Greg CarbonePublisher:PEARSONEnvironmental ScienceEarth ScienceISBN:9781260153125Author:William P Cunningham Prof., Mary Ann Cunningham ProfessorPublisher:McGraw-Hill Education
- Earth Science (15th Edition)Earth ScienceISBN:9780134543536Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. TasaPublisher:PEARSONEnvironmental Science (MindTap Course List)Earth ScienceISBN:9781337569613Author:G. Tyler Miller, Scott SpoolmanPublisher:Cengage LearningPhysical GeologyEarth ScienceISBN:9781259916823Author:Plummer, Charles C., CARLSON, Diane H., Hammersley, LisaPublisher:Mcgraw-hill Education,





