A deposit of a pyroclastic flow. Because of confusion in past use, the term is best restricted to deposits rich in pumice. Some of the largest single eruptive units known (>1,000 km3) are ignimbrites, associated with major explosive volcanic eruptions such as Santorini (1470 BC), Krakatau (AD 1883) and Mount St. Helens (AD 1980). Many ignimbrite deposits are preserved as extensive sheets of welded tuff.
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Abstract Calderas are sub-circular, polygonal or elongate subsidence basins formed by the withdrawal of magma from subvolcanic reservoirs. They are
Abstract Volcanic landforms on the Earth range are shapes and sizes from tiny scoria cones to enormous flood basalt or ignimbrite plateaux. Controls
Full text Article Volcanic Successions Associated with Ore Deposits: Facies Characteristics and Ore–Host Relationships
Abstract We review the main characteristics of volcanic successions that commonly host important resources of gold, silver, nickel, copper, lead, zi