Volcanic crater - Wikipedia
A volcanic crater is an approximately circular depression in the ground caused by volcanic activity. [1] It is typically a bowl-shaped feature containing one or more vents. During volcanic eruptions , molten magma and volcanic gases rise from an underground magma chamber , through a conduit, until they reach the crater's vent, from where the ...
Volcanic Craters - U.S. National Park Service
A volcanic crater is a bowl- or funnel-shaped depression that usually lies directly above the vent from which volcanic material is ejected. Craters are commonly found at the summit of volcanic edifices, but they may form above satellite (flank) vents of composite and shield volcanoes.
What is a volcanic crater? Made SIMPLE - The geography teacher
A volcanic crater is a geological feature formed at the summit of a volcano during explosive eruptions or collapse events. It is typically a circular depression in the Earth’s surface, varying in size and depth depending on the volcanic activity.
About Volcanoes | U.S. Geological Survey - USGS.gov
Volcanoes are openings, or vents where lava, tephra (small rocks), and steam erupt onto the Earth's surface. Volcanic eruptions can last days, months, or even years. What is a volcano? Redoubt volcano with minor ash eruption. Photograph taken during observation and gas data collection flight by AVO staff March 30, 2009.
Anatomy of a Volcano - U.S. National Park Service
Volcanoes are both the vents where molten rock material and volcanic gases are erupted from within Earth’s interior, and the cones and mountains built up around those vents. But beyond this simple definition, volcanoes are incredibly diverse with some types being very complex.
Types of Volcanoes - Volcanoes, Craters & Lava Flows (U.S.
They range from the majestic Mount Rainier, to colossal shield volcanoes like Mauna Loa (Hawai'i Volcanoes National Park), and to volcanic fields that can cover hundreds of square miles such as at Craters of the Moon National Monument.
Caldera or crater…what’s the difference? | U.S. Geological Survey
2024年1月8日 · By strict definitions, a caldera is a type of crater, but calderas are distinguished by their large sizes and specific association with volcanic collapse. Yellowstone is a caldera. The eruption that occurred 631,000 years ago largely emptied the magma chamber, and the ground collapsed into the resulting void.
Crater - Wikipedia
A crater has classically been described as: "a bowl-shaped pit that is formed by a volcano, an explosion, or a meteorite impact". On Earth, craters are "generally the result of volcanic eruptions", while "meteorite impact craters are common on the Moon, but are rare on Earth".
Volcano - Calderas, Magma, Eruptions | Britannica
2024年11月12日 · Learn about the volcanic collapse of Mount Mazama and Crater Lake caldera formation in Cascade Range Crater Lake is located within a huge volcanic caldera in the Cascade Range of southwestern Oregon. The caldera was formed when …
Crater - Education | National Geographic Society
2024年4月17日 · Volcanic activity often creates craters. Some volcanic craters are deep and have steep sides. Others are wide and shallow. A crater is not the same thing as a caldera. Craters are formed by the outward explosion of rocks and other materials from a volcano.