EARTH SCIENCE
FOSSILS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Older rock layers will be found under younger rock layers.
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Rock layers are always younger than the igneous intrusions that cut through them.
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Nonconformities are sedimentary rocks that lie on top of metamorphic or igneous rock layers
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Faults, intrusions, folding, and tilting are examples of disturbances.
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Detailed explanation-1: -The principle of cross-cutting relationships states that a fault or intrusion is younger than the rocks that it cuts through.
Detailed explanation-2: -A mass of igneous rock below the surface is called an Intrusion. It is always younger than the rock layers around and beneath it.
Detailed explanation-3: -Because the sedimentary rock layers have to be present before the molten rock cuts through them, the igneous rock must be younger than the layers it cuts through. If the molten rock erupts and flows onto the surface, it forms a layer of igneous rock on top of the layers of sedimentary rock.
Detailed explanation-4: -Magma may push into bodies of rock below the surface. There, the magma cools and hardens into a mass of igneous rock called an intrusion. An intrusion is always younger than the rock layers around and beneath it.