Relaive Age Extra Credit The image above is a cross-sectional view through sedim
ID: 293327 • Letter: R
Question
Relaive Age Extra Credit The image above is a cross-sectional view through sedimentary rock strata that have been intruded by H The hash marks around H indicate a contact metamorphic aureole. There is also a fault (bold line) that is unlabeled Which rock is older, I or F? What stratigraphic principle allowed you to determine the relative ages of I and F? Which is older, H or the fault? 1. 2. 3. 5. A disconformity separates which rock units? b. F and M B and I c. Is the boundary between H and R and igneous contact or a non-conformity? Provide evidence to support your answer. 6.Explanation / Answer
1) I
in the case of layered sedimentary deposition the younger bed will be at the top and older beds are at lower side unless it is tilted by the forces.
2)principle of superposition
it is the basic law of chronology of deposits. according to this in an undisturbed deposition younger layers are at the top and older layers are at the bottom.
3) Fault.
the intrusion has passed through the fault system, which means that intrusion occured after the faulting occured.
4) principle of cross cutting relationship
if the intrusion passed through a layered strata, then the intrusion is younger than the layers.
5) B and I
6) a nonconformity.
a nonconformity lies between sedimentary rock and metamorphic or igneous rock, when the sediments deposit on the preexisting igneous or metamorphic rock. in this case the layer "R" is deposited bove the igneous intrusion.