Which sedimentation outcome occurs when a fjord's sill restricts water exchange leading to anoxia?

💡 Explanation

When a fjord's sill restricts water exchange, anoxia develops in deep waters because oxygen replenishment is limited while organic matter decomposition consumes available oxygen, therefore varved clay sediments form due to seasonal variations in sediment input and anoxic conditions preventing bioturbation, rather than other sediment types which need oxygenated conditions.

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