ash cone


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Related to ash cone: Volcanic cone

ash cone

[′ash ‚kōn]
(geology)
A volcanic cone built primarily of unconsolidated ash and generally shaped somewhat like a saucer, with a rim in the form of a wide circle and a broad central depression often nearly at the same elevation as the surrounding country.
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References in periodicals archive ?
Left behind is a horse-shoe shaped ridge, harbouring a slowly growing ash cone at its centre.
By using these measures, clogging of tube lines was avoided, but the formation of ash cones at ash fields has continued.