#Caldera
A **caldera** typically forms after a **massive volcanic eruption** empties a magma chamber beneath the volcano. - With the support gone, the ground above collapses and creates a large crater-like feature.
ERA Token / Coin (Cryptocurrency Projects)** There have been or currently are small-scale blockchain or cryptocurrency projects that use the name **ERA** or **Era Coin**. These often come with different purposes such as: