Which mechanism primarily causes downslope movement of the active layer during solifluction?

💡 Explanation

When the active layer thaws, viscous creep occurs because the saturated soil flows downslope due to gravity during freeze-thaw, leading to solifluction. Therefore viscous creep with thaw cycles is the driver, rather than the alternative processes requiring significantly different conditions and bedrock composition.

• Which effect intensifies when freeze-thaw cycles erode bedrock within a glacial cirque?
• Which outcome results downstream of the Pacific Equatorial Undercurrent during a strong El Niño event?
• Which mechanism causes the formation of horst and graben structures within a continental rift zone?
• Which geological outcome primarily results from magma with high silica content and dissolved gases reaching Earth's surface?
• Which consequence results when accelerated limestone pavement dissolution occurs?
• Which increased outcome is caused along artic slopes due to repeated freeze-thaw cycles acting together?