(1) Eventually the central location within the volcano was again utilized for magma storage and a deep caldera was produced.(2) The presence of the fluid layer makes this whole process comparable with the formation of a caldera by the foundering of the superstructure of a volcano into a void generated by the removal of magma.(3) This type of volcano is called a caldera , and is one of the most violent.(4) Mayor Island is a shield volcano with a caldera in the western part of the Bay of Plenty, off the east coast of New Zealand.(5) This is in direct contrast to earlier work which argues that these calderas were not united until a central caldera formed late in the volcano's lifespan.(6) Pago is the active vent of a large volcano known as Witori caldera - a collapsed crater that formed during an extremely large explosive eruption about 3,300 years ago.(7) Stand anywhere there and look out at the caldera (volcano basin).(8) He ends with the story of Anak Krakatoa, the new volcano rising in the caldera of the old volcano. and the way that life is taking hold in a doomed landscape.(9) One particularly large eruption, about 28 million years ago, left in its wake a huge caldera , or crater-like basin, about 15 km in diameter and about 2 km above sea level.(10) A large body of magma, capped by a hydrothermal system (a zone of pressurized steam and hot water), still exists beneath the caldera .(11) The structures are bounded by a series of extensional ring faults that exhibit similarities to salt withdrawal basins, caldera collapse features and impact craters.(12) Scientifically speaking, Sulphur Springs is a caldera , or collapsed volcanic formation.(13) Faulting and deformation may be concentrated at a caldera because the caldera structure and associated magmatic system form weak zones in the crust.(14) This landslide material was then embayed by lava when the central caldera was flooded.(15) Instead, Io's surface is dominated by volcanic features, notably gentle shield volcanoes with summit calderas several tens of kilometres across and surrounded by radial lava flows.(16) In December, members of the same research team revealed that calderas on five major Mars volcanoes were repeatedly active as little as 2 million years ago.