K\' 2 ?? ?? The image above consists of sedimentary strata (A, B, C) overlying m
ID: 293328 • Letter: K
Question
K' 2 ?? ?? The image above consists of sedimentary strata (A, B, C) overlying metamorphic (D, E, F) and igneous rocks (G). The igneous rock H cuts across all other rocks. 7. What is represented by K-K'? a. disconformity b. angular unconformity c. nonconformity 8. J-J' is a fault. Is it older or younger than G? 9. Is the boundary between A and H an igneous contact or an unconformity? 10. Which order of events is correct? a. E is older than the fault, which is older than G (E, fault, G) b. E is older than the fault, which is younger than G (E, G, fault)Explanation / Answer
7) The unconformity K-K' is a Nonconformity, because a nonconformity lies between sedimentary rocks and metamorphic or plutonic rock when the sedimentary rock lies above.
8)J-J' fault is older than G, we can assume this because all the metamorphic strata D,E,and F have slided down or pushed up due to the faulting, but G which is an igneous intrusion have no effect from fault, thus , it is clear that faulting occured prior to the intrusion of G.
9) The boundary between A and H is an igneous contact, because it has been intruded from the depth of the crust to the upper portion, no type of unconformity this, unconformity is just the time gap between two ,younger and older rocks. From the figure, it seems like it is a intrusion of dike which was named H.
10)Here the option A is correct.
Yes, Metamorphic strata E is surely older than the fault, because it has been slided down or pushed up after the event of faulting. And the fault is older than G because , G has no effect of fault, that means G is an igneous intrusion which occured after faulting.
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