How could we restore a folded layer?
What will be an ideal response?
Ans: In cross-section a folded layer can be restored by means of vertical and inclined shear. A common example is the restoration of a rollover or reverse drag above a tonic ones occur enveloped in a later fabric, typically with inclusion trails oblique to the external and later foliation. In other words they occur as porphyroclasts. Syntectonic porpyroblasts grew during deformation. Because porphyroblasts grow outward and because the external foliation tends to rotate with respect to the porphyroblast the inclusion trails commonly become deflected towards the margins of the porphyroblasts. In extreme cases spiral-shaped patterns may occur, particularly in garnets. It may however be difficult to distinguish between syn- and intertectonic porphyroblasts in cases where intertectonic ones overgrow a crenulated fabric.
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In which of the following conditions do valley breezes form?
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What is the elevation of the highest contour line at the top of the eastern Twin Butte?
The question is based on the lower right (southeast) corner of the “Greasewood Spring, Arizona,” quadrangle (Maps T-18 and T-19 shown in color in the back of the Lab Manual). What will be an ideal response?
What statement best describes the concept of mutation?
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Many polluted ecosystems, such as those suffering from eutrophication, will recover if humans stop polluting them. This illustrates
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