Which outcome occurs when magma cools rapidly within a volcanic vent of a lava dome?

💡 Explanation

A glassy obsidian crust forms because extremely low water content and the rapid cooling prevent crystal formation—vitrification—therefore creating an amorphous solid rather than a crystalline one; rather than forming blocky or ropey lava.

• Near the equator, which outcome occurs when insolation reaches a maximum?
• Which flow regime results from increased geostrophic balance deviation?
• Which outcome occurs when persistent atmospheric high-pressure systems block coastal upwelling currents?
• Which mechanism causes the formation of karst topography when rainwater infiltrates limestone?
• Which process generates seismic waves characterized by high frequency and rapid attenuation during shallow crustal earthquakes?
• Which coastal change occurs with reduced sediment deposition?