Which morphological change dominates when high-viscosity rhyolitic lava cools?

💡 Explanation

The formation of a lava dome dominates, because the high viscosity inhibits flow, driving vertical extrusion via PLUG FLOW rather than spreading; therefore a steep-sided dome forms, rather than a flatter shield volcano shaped by fluid lavas.

• Which outcome occurs when a steep mountain slope underlying a glacial cirque thaws, exceeding its angle of repose?
• Which outcome results when upper-level divergence aloft exceeds surface convergence in a monsoonal cell?
• Which outcome occurs when differential stress exceeds strength in brittle rocks during subduction?
• Which atmospheric effect causes an elongated wave pattern in upper-level winds?
• Which effect increases continental aridity within subtropical zones?
• Which outcome will accelerate following a breach in a barrier island?