Which process establishes distinct stratification layers within a dimictic lake?

💡 Explanation

When surface water reaches maximum density at 4°C, seasonal turnover via density occurs because colder water sinks, creating distinct thermal layers like epilimnion, metalimnion, and hypolimnion during summer stagnation and isothermal conditions after mixing upon ice formation. Therefore thermal stratification results, rather than changes through eutrophication.

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• Which mechanism most directly causes an earthquake's surface waves to amplify in specific regions?