Problem B Cross Section: (total 9.5 points) Label the following events from olde

Question

Problem B Cross Section: (total 9.5 points) Label the following events from oldest (1) to youngest (11). (5.5 pts) _ uplift and erosion, forming UC3 modern day surface -oceans rise or land subsides deposition of F.I,B forming UC2 -tilting and uplift of F,LB Fault G folding of D,H.A uplift and erosion of D formation of Gneiss, layer D oceans rise/ land subsides deposition of H and A, formin UC1 -Intrusion of C ocean riseland subsides deposition of E, forming UC3 uplift and erosion of D, H, A 8) What type of unconformity (UC1) exists between sedimentary unit H and layer D (gneiss)? (0.5 pt) a) disconformity b) nonconformity c) angular unconformity 9) What type of fault (specific type) is fault G? (0.5 pt) a) left lateral strike slip b) reverse dip slip c) right lateral strike slip d) normal dip slip 10) What type of stress is associated with fault G? (0.5 pt) a) compression b) tension c) ductile (plastic) d) brittle e) shear 11) Fault G is an example of what type of deformation (strain)? (0.5 pt) a) compression b) ductile (plastic) c) tension d) elastic e) brittle 2) At what type of plate boundary would this type of fault form? (0.5pt) a) divergent b) convergent c) transform 3) What type of folding of layers D, H , A do you see in the headwall side of the fault? (0.5pt) a) syncline b) anticline c) brittle d) plastic

Explanation / Answer

Answers to a) based on the cross-cutting relations and the sprinciple of superposition.

8. Since the unconformity is between the sedimentary layers and the igneous granite it is a nonconformity

9. Since the hanging/headwall wall movement is down the fault surface it is a normal dip slip fault

10.Since it is a normal fault the associated stress is tension

11. Since G is a fault it is a brittle type of deformation

12. Normal faults are always associated with a divergent type of plate boundary

13. Since the limbs of the fold dip in opposite direction, the fold is an anticline

14. Since the parent and the daughter are in exact proportions this means that only one-half life of the element is passed hence the intrusion C is 350 million years old

15.Paleozoic, Missippian based on the age and timescale.

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.