Which mechanism causes the formation of horst and graben structures within a continental rift zone?

💡 Explanation

When crustal extension occurs, normal faulting develops because gravity causes the hanging wall to slide downward relative to the footwall, leading to the formation of horst and graben structures. Therefore, normal faulting results, rather than reverse, strike-slip, or thrust faulting, which require compressional, shear, or buckling forces.

• Which mechanism causes meandering stream morphology enhancement when vegetation is disrupted along riverbanks?
• Which mechanism causes increased stream erosion downstream of a dam following heavy precipitation?
• Which fluvial consequence results when river meander erosion breaches its narrow neck?
• Which mechanism causes dry conditions at latitudes around 30 degrees north and south?
• Which phenomenon exacerbates lahar formation following a volcanic eruption event?
• Which mechanism causes increased stream meandering in regions where the jet stream weakens and becomes more zonal?