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← GeographyWhich process explains differences in fjord sill depth and isostatic rebound rates?
A)Differential glacial erosion rates by bed lithology✓
B)Variable tectonic subsidence influences
C)Localized heat flux differences from volcanism
D)Changes to marine sedimentation budget dynamics
💡 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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