pit crater

Pit craters are circular-shaped craters formed by the sinking or collapse of the ground. Fissures may erupt from the walls or base of a pit crater, but pit craters are not constructional features built by eruptions of lava or tephra. Pit craters may also partially fill with lava to form a lava lake. They are common along rift zones of shield volcanoes; for example, Mauna Loa and Kilauea volcanoes in Hawai`i. No one has observed the formation of a large pit crater, but they are thought to form as a consequence of the removal of support by withdrawal of underlying magma.
Photograph by J.D. Griggs on 5 December 1990
Aerial view of Hi`iaka pit crater on the east rift zone of Kilauea Volcano, Hawai`i. The floor of the crater is covered by solidified lava that poured into the crater from the lower right (note black lava flow at crater rim).

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

Look at other dictionaries:

  • Pit crater — A pit crater (also called a subsidence crater) is a depression formed by a sinking of the ground surface lying above a void or empty chamber, rather than by the eruption of a volcano or lava vent. [cite web… …   Wikipedia

  • Crater — may refer to: In landforms: Impact crater, caused by two celestial bodies impacting each other, such as a meteorite hitting a planet Volcanic crater or caldera, formed by volcanic activity Subsidence crater, from an underground (usually nuclear)… …   Wikipedia

  • Crater — Cra ter (kr[=a] t[ e]r), n. [L. crater, cratera, a mixing vessel, the mouth of a volcano, Gr. krath r, fr. keranny nai to mix; cf. Skr. [,c]r[imac] to mix, [,c]ir to cook, [,c]r[=a] to cook. Cf. {Grail}, in Holy Grail.] 1. The basinlike opening… …   The Collaborative International Dictionary of English

  • pit — [n] hole, cavity abyss, chasm, crater, dent, depression, dimple, excavation, grave, gulf, hell, hollow, indentation, mine, perforation, pockmark, pothole, puncture, shaft, tomb, trench, well; concepts 509,513 Ant. mountain pit [v] oppose, play… …   New thesaurus

  • crater — [krāt′ər] n. [L, mixing bowl, mouth of a volcano < Gr kratēr < kerannynai, to mix: see IDIOSYNCRASY] 1. in ancient Greece or Rome, a kind of large bowl or jar shaped like an amphora 2. a bowl shaped cavity, as at the mouth of a volcano or… …   English World dictionary

  • crater — crateral, craterous, adj. craterlike, adj. /kray teuhr/, n., gen. Crateris /kray tear is/ for 9, v. n. 1. the cup shaped depression or cavity on the surface of the earth or other heavenly body marking the orifice of a volcano. 2. Also called… …   Universalium

  • pit — I n 1. hole, cavity, excavation, quarry, diggings, workings; shaft, mine, tunnel, bank, coal mine, gold mine, silver mine; ditch, grave, burial site; dip, sink, gully, gulch, furrow, burrow, trough; foxhole, bunker, entrenchment, trench; well,… …   A Note on the Style of the synonym finder

  • crater — 1. noun /ˈkɹeɪ.tə(ɹ),ˈkɹeɪ.tɚ/ a) A hemispherical pit created by the impact of a meteorite or other object. 1843 I then had the two best tarriers beneath the canopy; this poor crater is their daughter, and he patted the dogs head affectionately.… …   Wiktionary

  • pit — Synonyms and related words: American Stock Exchange, Amex, L, R, Wall Street, abysm, abyss, acorn, acting area, agora, alveolation, alveolus, amphitheater, antrum, apron, apron stage, arena, armpit, athletic field, audience, auditorium, auditory …   Moby Thesaurus

  • pit — I 1. noun 1) a pit in the ground Syn: hole, ditch, trench, trough, hollow, excavation, cavity, crater, pothole; shaft, mineshaft, sump 2) pit closures Syn …   Thesaurus of popular words

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