Answer :
Based on the law of superposition, geologists can conclude that the limestone rock layer is younger than the sandstone layer below it.
This is because the law of superposition states that in an undisturbed sequence of rock layers, the oldest layer is at the bottom and the youngest layer is at the top. Therefore, since the sandstone layer is found below the limestone layer, it must be older.
The age of the limestone layer itself cannot be determined solely based on the law of superposition. While geologists can infer that the limestone layer is younger than the underlying sandstone layer, they would need to use other methods such as radiometric dating to determine the actual age of the rock layer.
Similarly, the presence of fossils in the limestone layer cannot be determined based solely on the law of superposition. While it is possible that the limestone layer may contain fossils, this would need to be confirmed through further investigation and analysis.
The age of another layer 100 kilometers away also cannot be determined solely based on the law of superposition. While the law of superposition can provide information about the relative ages of rock layers within a local area, it cannot be used to compare the ages of rock layers in different locations.
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