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Describe the visual differences between slate (159) and schist (167).mmglasill Which of these two rocks has experienced a greater degree of metamorphism? Why? Examine and describe the specimen of gneiss (173). How is the gneiss similar to, yet different from, the schist? How do you think these differences might arise?

Describe the visual differences between slate (159) and schist (167).mmglasill Which of these two rocks has experienced a greater degree of metamorphism? Why? Examine and describe the specimen of gneiss (173). How is the gneiss similar to, yet different from, the schist? How do you think these differences might arise?

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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**Sample Set #5** **Metamorphic Rocks** Sedimentary rocks exposed to the effects of heat and pressure can undergo extensive chemical and physical changes. This alteration is referred to as metamorphism. Figure 4, on the next page, shows a series of layered rocks consisting of sedimentary formations that have been cut by a dike (cross-cutting planar intrusion) and, at greater depth, intruded by a batholith (large intrusion). It is in situations like this that sedimentary layers can be metamorphosed due to their proximity to hot, molten rock from which chemically active solutions are released. Near the dike, rocks which further away are limestones (114) have metamorphosed into marbles (154). Similarly, sandstones (141) have become quartzites (165). In the vicinity of the batholith, the action of heat and chemical solutions is accompanied by pressure produced by the batholith as it forces its way upward. Horizontal rock layers exposed to such pressure are folded and deformed. The result is the highly contorted layering illustrated in Figure 10. Such layering produced during metamorphism is called foliation. In such situations, rocks undergo varying degrees of metamorphism depending on their proximity to the batholith and to the intensity of deformation. Shales (112) can be metamorphosed to slates (159), schists (167), and gneiss (173) as metamorphic intensity increases. *Figure 4 Description:* The diagram is a generalized cross-section of a sequence of sedimentary rocks intruded by an igneous batholith. The layers exhibit their original horizontal orientation away from the batholith where pressure resulting from the upward movement of the batholith is small. Near the batholith where pressures are much higher, the layering has been deformed and is greatly contorted. The different shading patterns illustrate various original rock types: - **Igneous Rocks**: Basaltic, forming the dike. - **Originally Sandstone**: Horizontal layers that become quartzite near the batholith. - **Originally Limestone**: Transformed into marble next to the dike. - **Originally Shale**: Changes into slate, schist, and gneiss with increasing metamorphic intensity near the batholith. Locations of metamorphosed (marked with an "X") and unmetamorphosed rocks occur among lab specimens, with ID numbers provided for representative examples.
Transcribed Image Text:**Sample Set #5** **Metamorphic Rocks** Sedimentary rocks exposed to the effects of heat and pressure can undergo extensive chemical and physical changes. This alteration is referred to as metamorphism. Figure 4, on the next page, shows a series of layered rocks consisting of sedimentary formations that have been cut by a dike (cross-cutting planar intrusion) and, at greater depth, intruded by a batholith (large intrusion). It is in situations like this that sedimentary layers can be metamorphosed due to their proximity to hot, molten rock from which chemically active solutions are released. Near the dike, rocks which further away are limestones (114) have metamorphosed into marbles (154). Similarly, sandstones (141) have become quartzites (165). In the vicinity of the batholith, the action of heat and chemical solutions is accompanied by pressure produced by the batholith as it forces its way upward. Horizontal rock layers exposed to such pressure are folded and deformed. The result is the highly contorted layering illustrated in Figure 10. Such layering produced during metamorphism is called foliation. In such situations, rocks undergo varying degrees of metamorphism depending on their proximity to the batholith and to the intensity of deformation. Shales (112) can be metamorphosed to slates (159), schists (167), and gneiss (173) as metamorphic intensity increases. *Figure 4 Description:* The diagram is a generalized cross-section of a sequence of sedimentary rocks intruded by an igneous batholith. The layers exhibit their original horizontal orientation away from the batholith where pressure resulting from the upward movement of the batholith is small. Near the batholith where pressures are much higher, the layering has been deformed and is greatly contorted. The different shading patterns illustrate various original rock types: - **Igneous Rocks**: Basaltic, forming the dike. - **Originally Sandstone**: Horizontal layers that become quartzite near the batholith. - **Originally Limestone**: Transformed into marble next to the dike. - **Originally Shale**: Changes into slate, schist, and gneiss with increasing metamorphic intensity near the batholith. Locations of metamorphosed (marked with an "X") and unmetamorphosed rocks occur among lab specimens, with ID numbers provided for representative examples.
--- **Educational Website Text Transcription** **Describe the visual differences between slate (159) and schist (167).** * (Write your observations here) * * * **Which of these two rocks has experienced a greater degree of metamorphism? Why?** * (Provide your analysis here) * * * **Examine and describe the specimen of gneiss (173).** * (Detail your description here) * * * **How is the gneiss similar to, yet different from, the schist? How do you think these differences might arise?** * (Discuss your thoughts here) * * * --- (Note: Ensure to upload relevant images of slate, schist, and gneiss for visual comparison if available.)
Transcribed Image Text:--- **Educational Website Text Transcription** **Describe the visual differences between slate (159) and schist (167).** * (Write your observations here) * * * **Which of these two rocks has experienced a greater degree of metamorphism? Why?** * (Provide your analysis here) * * * **Examine and describe the specimen of gneiss (173).** * (Detail your description here) * * * **How is the gneiss similar to, yet different from, the schist? How do you think these differences might arise?** * (Discuss your thoughts here) * * * --- (Note: Ensure to upload relevant images of slate, schist, and gneiss for visual comparison if available.)
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