It is a Convergent Boundary, with compression stress, on a reaverse fault
a caldera
An volcanic eruption can sometimes be so powerful, the volcano collapses onto itself and forms a wide crater. Eventually rain will fill that creator, forming a volcanic lake. An example of this is crater lake.
The largest volcanic crater is Lake Tobi. This volcanic crater lake has an area of 1,130 km². It has a depth of up to 505 meters.
The large volcanic depression occupied by Crater Lake, Oregon is a
Crater Lake in Oregon, USA
volcanic
Crater Lake was formed when Mount Mazama collapsed during a cataclysmic volcanic eruption and formed a crater-like hole called a caldera. In Native American legend sky god Named Skell and Llao ( god of the underworld) were battling. While they were The Mountain was destroyed and the remains of it fell and made what we know today as crater lake!
The biggest crater lake in New Zealand would be Lake Taupo. I believe there are bigger crater lakes elsewhere in the world. Lake Manicouagan in Canada, is about 100km wide, but is not volcanic.
Crater Lake is located in the state of Oregon and is the deepest lake in the United States. The lake was created by a massive volcanic eruption that occurred around 5700 BC.
The island in Crater, called Wizard Island was formed by small volcanic eruptions that occurred after the Crater Lake caldera formed but before the volcano went extinct.
Lake Nyos is a crater lake located in the Northwest region of Cameroon. It is a deep lake high on the flank of the inactive volcano in the oku volcanic plain along the Cameroon line of volcanic activity.
A caldera is the depression atop a volcanic landform, either active or dormant. It can be very large and becomes less visible after a long period of erosion. A crater lake forms when the surface of the caldera is impermeable rock, and there is no way for precipitation to drain. On high mountains with glaciers, small lakes can form seasonally from meltwater.