Which outcome occurs when rhyolitic lava encounters groundwater?

💡 Explanation

A phreatomagmatic eruption occurs because intense heat from the lava instantly boils the groundwater resulting in steam which rapidly expands; this explosive expansion causes fragmentation, producing large quantities of tephra, rather than gentle outgassing or effusive flow.

• Which phenomenon inhibits stalactite formation immediately downstream acidic industrial discharge?
• Which outcome results when intense freeze-thaw weathering affects granitic bedrock in high-alpine regions?
• Which effect results when an offshore thermal vent heats density-stratified ocean streams?
• Which landform results through freeze-thaw weathering and glacial erosion causing cirque enlargement?
• Which risk increases when saturated soil undergoes thaw cycles on a moderate slope in periglacial tundra?
• Which mechanism causes uplift and mountain building along convergent plate boundaries with strike-slip fault zones?