ASBOG Practice Exam

What is the definition of 'heave' in the context of fault movement?

1. Vertical displacement along a fault

2. Horizontal movement along a fault

3. Measurement of strike separation

4. The angle of the fault

The correct answer is: Horizontal movement along a fault

In the context of fault movement, 'heave' specifically refers to the vertical displacement along a fault. It is typically measured as the vertical distance between points on the fault plane before and after movement occurs. Heave is a critical concept in understanding how geological structures shift and change over time. While some might confuse it with horizontal movement, heave indicates that the primary concern is the vertical shift that occurs, rather than horizontal displacement. The various measurements and angles associated with faults further enrich our understanding of geology, but they do not define 'heave' directly. Understanding heave is essential for geologists when analyzing fault mechanics and assessing seismic hazards.