Which process primarily contributes to the formation of anoxic zones in deep fjord basins?

💡 Explanation

When fjords form from glacial action, deep basins develop which restrict water circulation because stratification prevents oxygen replenishment in lower depths resulting in the formation of anoxic zones. Therefore limited vertical water mixing results, which is a larger factor than glacial erosion, upwelling, or increased sediment influx which play secondary roles.

• Which phenomenon increases when topsoil experiences reduced throughflow?
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• Which airflow deflection outcome occurs when air masses move poleward from the equator?
• Which outcome occurs when glacial meltwater deposits sediment?
• Which topographic feature is primarily formed by glacial erosion within a cirque?