Which process determines fjord sill depth after glacial retreat ceases and sea levels stabilize?

💡 Explanation

When glacial ice melts, isostatic rebound occurs because the reduced load allows the lithosphere to elastically rebound and the mantle beneath to flow, a process constrained by mantle viscosity, subsequently controlling fjord sill depth. Therefore, lithospheric viscosity in isostatic adjust dictates depth rather than water-based mechanisms, such as thermal expansion or sediment related processes which influence local bathymetry differently.

• Which mechanism causes coastal uplift following a megathrust earthquake at a subduction zone?
• Which mechanism contributes to the oxygen stratification observed in deep fjords containing density gradients?
• Which event triggers landscape evolution of oxbow lake's infill?
• Which environmental consequence results when volcanic tephra deposition follows heavy rainfall?
• Which geographic feature results when prevailing wind encounters an obstacle, reducing its velocity and causing increased alluvial deposition?
• Which phenomenon explains the deflection effect on ocean currents caused by Earth's rotation, influencing global heat distribution?