Which consequence results when sand supply decreases near a barrier island system?

💡 Explanation

Reduced sand supply initiates overwash, furthering the island's landward migration because of loss of sediment for natural rebuilding processes; therefore, migration increases, rather than building the islands seaward or increasing mainland stability since longshore drift's sediment deposition changes.The mechanism is barrier island transgression.

• Which effect results when persistent ice dams form along glacial meltwater streams?
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• Which mechanism causes deep-focus earthquakes at subduction zones along the Wadati-Benioff zone?
• Which progression results when differential wave erosion undermines a stack?
• Which mechanism reduces primary productivity in the eastern Pacific Ocean during an El Niño event?