GEOLOGY
STRATIGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The fault is older that all four layers.
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The fault is younger than all four layers.
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The fault is older than the bottom two layers and younger than the top two layers.
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The fault developed at the same time as the rock layers were deposited.
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Detailed explanation-1: -A fault cuts through four successive rock layers. Which is most likely true? The fault is older that all four layers.
Detailed explanation-2: -It is always younger than the rock layers around and beneath it. A fault is a break in the Earth’s crust. A fault is always younger than the rock it cuts through.
Detailed explanation-3: -The law of superposition states that rock strata (layers) farthest from the ground surface are the oldest (formed first) and rock strata (layers) closest to the ground surface are the youngest (formed most recently).
Detailed explanation-4: -The bottom layer of rock forms first, which means it is oldest. Each layer above that is younger, and the top layer is youngest of all.
Detailed explanation-5: -Inclusions are always older than the rock they are found in. Even if we did not see the igneous and metamorphic rocks in surface exposures, the fact that they occur in the (brownish) sediment unit indicates the presence of older ingneous and metamoprhic rocks that supply material to that unit.