Which surface deformation pattern indicates active solifluction on moderate slopes in tundra regions?

💡 Explanation

When seasonally thawed active layer overlies permafrost, solifluction (soil flow) occurs because the saturated soil loses shear strength, resulting in the slow, downslope movement and formation of terracettes. Therefore terracettes indicate active solifluction, rather than eskers, drumlins, or kettle holes which are formed by glacial processes.

• Which long-term outcome happens when intense *bioturbation* decreases topsoil density?
• Which consequence results when excessive subsurface water flows inhibit bioturbation?
• Which outcome occurs when stress exceeds static friction along an existing transform fault?
• Which landform evolution results when multiple cirques erode different sides of a mountain?
• Which consequence results when barrier island sediment reservoirs deplete?
• Which mechanism causes reduced water column mixing within a fjord during spring snowmelt?