Which process results when a divergent plate boundary experiences decompression melting?

💡 Explanation

Mid-ocean ridge volcanoes form where asthenosphere material ascends because the reduced pressure at the divergent boundary decreases the rock's melting point, a process known as decompression melting. Therefore, basaltic magma is produced, rather than the andesitic eruptions seen over subduction zones.

• Which effect most immediately reduces primary productivity during El Niño events where upwelling of the Humboldt Current weakens?
• Which outcome occurs when increased atmospheric temperature gradients affect large-scale airborne volcanic ash dispersion?
• Which risk increases when the orographic effect intensifies wind flow?
• Which outcome results with enhanced ventifact formation because vegetation disturbance modifies desert wind patterns?
• Which outcome is most likely accompanying increased lahar flows down stratovolcano flanks?
• Which geological outcome results when sustained, unidirectional winds selectively erode fine sediments?