Which process explains differences in fjord sill depth and isostatic rebound rates?

💡 Explanation

When glaciers advance, differential glacial erosion occurs, deepening fjord basins based on varying rock resistance and fault structures; areas with softer rocks erode faster affecting isostatic rebound. Therefore, erosion causes differences in fjord sill features, rather than tectonic shifts sediment budget or varying heat flux , which are secondary geological processes.

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