objectives:
1.describe the changes in mineral components and texture of rocks due to changes in pressure and temperature(metamorphism);
2.identify rock samples based on the effects of changes of temperature and pressure;and
3.analyze theough a diagram on how temperature and pressure affect the mineral components and texture of rocks.
Answer (1)
A diagram might show a shale rock being transformed into a slate, then a schist, and finally a gneiss as temperature and pressure increase. Each stage would have different mineral assemblages and textures. By analyzing such diagrams, geologists can understand the processes that have shaped the Earth's crust and the formation of metamorphic rocks. Remember: Metamorphism is a complex process, and the specific changes that occur in a rock depend on the original rock type, the temperature and pressure conditions, and the presence of fluids.
