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EnglandGeologyQuick questions
Module 3: Global tectonics - Geological structures
Quick questions on Geological structures: folds, faults, joints, dip and strike and unconformities - OCR A-Level Geology
6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are folds?Show answer
When rocks are compressed and behave ductilely, they fold. The elements you must label are the limbs (the sides), the hinge (the line of maximum curvature) and the axial plane (the plane that bisects the fold).
What are faults?Show answer
When rocks are stressed and behave brittlely, they fracture and slip along faults. The fault type records the stress regime:
What are unconformities?Show answer
An unconformity is a surface representing a gap in the geological record (a period of erosion or non-deposition). Three types:
What is q1?Show answer
State which rocks (oldest or youngest) lie in the core of an anticline. [1 mark]
What is q2?Show answer
State the type of stress that produces a normal fault and describe the movement of the hanging wall. [2 marks]
What is q3?Show answer
Name the type of unconformity where horizontal sediments rest on eroded granite. [1 mark]
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