In the geologic cross section shown above, the prominet cross bedding in sandsto

Question

In the geologic cross section shown above, the prominet cross bedding in sandstone bed S indicates thai the top of the bed is toward the. A right of the S and sedimentary bed B is older than bed S B.right of the S and sedimentary bed B is younger than bed S C.left of the S and sedimentary bed B is older than bed S D.left of the S and sedimentary bed B is younger than bed S E.right of the S and sedimentary bed is older than bod S 9.The type of unconformity at the base of sedimentary bed is. A. an angular unconformity B. a disconformity C. a normal unconformity D. a nonconformityE. an overturned unconformity 10.The principle of cross-cutting relationships can be used to determine that. A. sedimentary bed is younger than the igneous intrusion B sedimentary bed is older than the igneous intrusion C.sedimentary bed X is older than the igneous intrusion D.sedimentary bed Z is younger than the igneous intrusion E.sedimentary bed S is younger than the igneous intrusion 11.The metamorphic aureole that surrounds the igneous rock indicates that it is. A.older than sedimentary bed Z B.younger than sedimentary bed X C.younger than the unconformity at the base of sedimentary bed X D.younger than sedimentary bed. E. older than sedimentary bed 12.The type of unconformity at the base of sedimentary bed X is. A.a nonconformity B.a disconformity C.an angular unconformity D.an overturned unconformity E.a normal unconformity.

Explanation / Answer

Answers: 12.(A).The type of unconformity at base of sedimentary bed X is a nonconformity.
nonconformity means a unconformity between sedmentary and igneous/metamorphic rock beds.
   11(D) younger than sedimentary bed Z.
   10(B) sedimentary bed U is older than the igneous intrusion.
9(A) an angular unconformity
   8(A) right of the bed S and sedimentary bed B is older than bed S.

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