Please help with the relative dating questions here PC Geology2 tation 4: Contac
ID: 153877 • Letter: P
Question
Please help with the relative dating questions here PC Geology2 tation 4: Contacts. Lab #5-Relative Dating-Part 1 What kind of sedimentary rock occurs above the granite? a) Sedimentary Rock b) Assume the granite clast (look at the lower image) is the same granite that occurs below the sedimentary rock in Contact the upper image. Which is older, the granite or the granite or the sedimentary rock? slightly weathered granite c Note that the slightly weathered granite on both side of the fresh granite. Which is older, the slightly weathered granite or the fresh granite? Why? (Hint: the difference in weathering is probably because of a difference in composition rather than a difference in age.) fresh granite What kind of contact separates the slightly weathered granite from the fresh granite? d) Clast of granite in the sedimentary rock found very close to the photo above. e) Did the granite form above or below the surface of the Earth? How do you know? f) How did the granite get to the surface where it is today? Part V- Homework for Relative Dating Lab toon showing a cross-Explanation / Answer
a) The sedimentary rock that occurs above the Granite is Conglomerate.
b) The granite is older than the sedimentary rock because according to the principle of inclusions, in sedimentary rocks, if inclusions (or clasts) are found, then the inclusions must definitely be older than the formation or rock that contains them.
c) The fresh granite is older because it occurs more like an intrusion that seems to have risen above the surface due to erosion of the upper layers of the formation.
d)The kind of contact that separates the fresh granite from the slightly weathered granite is a Disconformity.
NOTE : As per Chegg Policy, only the first 4 subparts (of any question that contain more than 4 subparts) are to be answered.