6. Refer to Figure 1. Which of the following is true regarding the age Dike Y? (

Question

6. Refer to Figure 1. Which of the following is true regarding the age Dike Y?

(1) it is younger than Cretaceous

(2) it is Precambrian in age

(3) it is older than Devonian

(4) it is older than Ordovician and younger than Silurian

(5) it is older Cretaceous and younger than Devonian

Figure 1 shows a cross-section (a vertical cut through the Earth) of several layers that have undergone several geological events, including, faulting, intrusion by dikes, erosion, deposition of sedimentary layers, etc. (not neccessarily in this order). Names such as Ordovician, Siliurian, Devonian, etc. refer to time periods in the Geologic Time Scale (see book) Cretaceous shale & sandstone Cretaceous conglomerate Precambrian granite Precambrian granite

Explanation / Answer

Answer is its older than Cretaceous and younger than Devonian.

Because dike y cuts through Devonian sandstone, which indicate is younger than Devonian. But its not cutting Cretaceous conglomerate, which means its older than Cretaceous.

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