Which mechanism causes stratification in deep glacial lakes during spring thaw?

💡 Explanation

When spring thaw begins, surface water warms, reducing its density relative to deeper, colder, denser water, forming a barrier to mixing. Therefore, density-driven stratification occurs, rather than mixing, salinity changes, or light absorption, which can affect but do not initiate stratification.

• Which mechanism limits lake formation when downcutting rate exceeds sediment deposition in a fluvial valley?
• Which geological outcome primarily results from strike-slip fault interaction with an underwater, sediment-filled canyon?
• Which effect on marine ecosystems results when upwelling currents are disrupted by strong, persistent offshore winds?
• Which mechanism causes increased coastal subsidence during an earthquake along a subduction zone lacking sediment?
• Which risk increases when a megathrust earthquake occurs along a subduction zone lacking strain partitioning?
• Which mechanism causes preferential sediment deposition on the uphill side of a fault-controlled alluvial fan?