Which outcome occurs when rhyolitic lava cools rapidly?

💡 Explanation

The formation of obsidian occurs due to rapid cooling which limits crystallization—a process called quenching. Because the high silica content prevents crystal formation, a glassy texture results. therefore obsidian forms, rather than different textured volcanic rocks.

• Which feedback effect accelerates cirque formation in alpine regions with seasonal snow cover?
• Which risk dramatically increases when groundwater recharge rates decline within karst regions overlying soluble carbonate rocks?
• Which process causes the formation of freshwater lakes in regions undergoing isostatic rebound following deglaciation?
• Which pedogenic effect follows enhanced chemical weathering by increased acidity?
• Which process causes accelerated crustal subsidence during large stratovolcano formation?
• Which risk increases as permafrost thaws due to increased global temperatures under buildings with pile foundations?