Caldera - Wikipedia
A caldera (/ k ɔː l ˈ d ɛr ə, k æ l-/ [1] kawl-DERR-ə, kal-) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the structural integrity of such a chamber, greatly ...
Is the Yellowstone supervolcano really 'due' for an eruption?
2023年1月21日 · The Yellowstone Caldera — the cauldron-like basin at the summit of the volcano — is so colossal that it is often called a "supervolcano," which, according to the Natural History Museum in...
Calderas - Education | National Geographic Society
2023年10月19日 · A caldera is a large depression formed when a volcano erupts and collapses. During a volcanic eruption , magma present in the magma chamber underneath the volcano is expelled, often forcefully. When the magma chamber empties, the support that the magma had provided inside the chamber disappears.
Volcano - Calderas, Magma, Eruptions | Britannica
2024年11月12日 · Most calderas—large circular or oval depressions more than 1 km (0.6 mile) in diameter—have been formed by inward collapse of landforms after large amounts of magma have been expelled from underground. Many are surrounded by …
Caldera: Crater Formed by Volcanic Collapse or Explosion - Geology.com
Calderas are some of the most spectacular features on Earth. They are large volcanic craters that form by two different methods: 1) an explosive volcanic eruption; or, 2) collapse of surface rock into an empty magma chamber. The accompanying image is a satellite view of one of the most famous calderas - Crater Lake in Oregon.
Yellowstone Caldera | Volcano type, Eruption, Size, Map, & Facts ...
Yellowstone Caldera, enormous crater in the western-central portion of Yellowstone National Park, northwestern Wyoming, that was formed by a cataclysmic volcanic eruption some 640,000 years ago. It measures approximately 30 by 45 miles (50 by 70 km), covering a …
Calderas - U.S. National Park Service
2023年4月17日 · Nonexplosive calderas are located at the summit of most large shield volcanoes, like Kīlauea and Mauna Loa in Hawai’i Volcanoes National Park. They form during VEI 0-1 (Effusive to Severe) eruptions that drain the shallow magma chambers located beneath them.
Caldera or crater…what’s the difference? | U.S. Geological Survey
2024年1月8日 · It's admittedly not an elegant terminology, but now you know how geologists use the term “caldera”—to describe both a large crater that results from collapse into an evacuated magma chamber, and also a type of volcano with no main central vent and that has experienced huge eruptions in the past.
Types of Calderas - Education
2024年4月30日 · A caldera is a depression created after a volcano releases the majority of the contents of its magma chamber in an explosive eruption. Without any structural support below, the land around the erupting volcanic vent or vents collapses …
Caldera | Volcanic, Formation, Crater | Britannica
2024年10月8日 · caldera, large bowl-shaped volcanic depression more than one kilometre in diameter and rimmed by infacing scarps. Calderas usually, if not always, form by the collapse of the top of a volcanic cone or group of cones because of removal of the support formerly furnished by an underlying body of magma (molten rock).