Essentials of Geology
4th Edition
ISBN: 9780393919394
Author: Marshak, Stephen
Publisher: W W Norton & Co Inc
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Question
Chapter 7, Problem 1RQ
To determine
The difference of the metamorphic rocks from that of the igneous rocks.
Expert Solution & Answer
Answer to Problem 1RQ
The metamorphic rocks are formed due to extreme conditions of temperature and pressure, resulting in the transformation of the texture and mineralogy of the parent rock without undergoing any melting. The igneous rocks are not transformed from any source of the rocks and have no foliation, while metamorphic rocks possess the foliation due to the compression under stress.
Explanation of Solution
The igneous rocks are formed when the molten magma or lava consolidates completely. When rocks are exposed to the surface, they undergo the process of weathering, erosion, transportation, and deposition followed by compaction giving rise to sedimentary rocks. When any types of rocks get buried deep inside the earth, they are subjected to high pressure, temperature, and volatile conditions. This process changes the texture in rocks and yield of some new minerals which are formed under these conditions only. Thus, these formed rocks are known as metamorphic rocks.
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44) In periglacial environments, the layer of ground that thaws every summer and freezes every winter is called
A) frost layer
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C) active layer
D) discontinuous permafrost
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Draw equipotential lines (lines of equal water table elevation) using regular intervals – creating a contoured map of the water table.
Determine the direction of groundwater flow based on the horizontal gradient. Label the areas of recharge and discharge directly on your map.
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Hydraulic Gradient, Specific Discharge (Darcy Flux), Average Linear Velocity:
Using your water table map, estimate an average hydraulic gradient between two locations, call them locations A and B, one at the eastern-most and a second at the western-most extent of your dataset (note the north arrow on the map).
Calculate the specific discharge, q, between the two locations. For this calculation…
Calculate all the values of table 1:
Q in (L/day)
Q out (L/day)
Residence time (days)
Please show all steps
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