Large,loose pyroclasts welded together during an eruption are known as _______.

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Agglomerates are formed when large, loose pyroclasts are ejected during an eruption and are welded together by the heat and pressure of subsequent volcanic activity. Tuff is a type of volcanic rock formed from fine-grained volcanic ash and fragments that are compacted and cemented together. Tephra refers to all the fragmented material that is ejected during a volcanic eruption, including pyroclasts and volcanic ash. Resurgent domes are formed when the magma chamber below a volcano partially empties and causes the caldera floor to uplift. Fumaroles are vents in the Earth's surface where steam and volcanic gases escape.

Large,loose Pyroclasts Welded Together During an Eruption Are Known as _______