1. plural of caldera; large volcanic craters formed by the collapse of a volcano's summit or by a massive eruption
Usage: geology term; always plural in this form

Examples

• The calderas of Yellowstone National Park are among the largest in the world.
• Many calderas in the Pacific Ring of Fire remain geologically active.
• Scientists study calderas to better understand volcanic processes.
• The calderas formed thousands of years ago during catastrophic eruptions.
• Crater Lake in Oregon sits within one of the deepest calderas in North America.