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Pyroclastic vs Lahar - What's the difference?

pyroclastic | lahar |

As nouns the difference between pyroclastic and lahar

is that pyroclastic is a rock mostly composed of rock fragments of volcanic origin while lahar is a volcanic mudflow.

As an adjective pyroclastic

is mostly composed of rock fragments of volcanic origin or comminuted during an eruption.

pyroclastic

English

Adjective

(-)
  • (vulcanology) Mostly composed of rock fragments of volcanic origin or comminuted during an eruption.
  • *{{quote-book
    • , year= 1862 , year_published= , author= , by= , title= The Student's Manual of Geology , url= http://books.google.com/books?id=3DUDAAAAQAAJ&pg=PA68 , original= , chapter= Igneous Rocks , isbn= , edition= 2 , publisher= Adam and Charles Black , location= Edinburgh , editor= , volume= , page= 68 , passage= The word "ash" is not a very good one to include all the mechanical accompaniments of a subaerial or subaqueous eruption, since ash seems to be restricted to a fine powder, the residuum of combustion. A word is wanting to express all such accompaniments, no matter what their size or condition may be, when they are accumulated in such mass as to form beds of "rock." We might call them perhaps "pyroclastic materials," ... }}

    Derived terms

    * pyroclastic flow * pyroclastic rock * pyroclastic surge

    Noun

    (en noun)
  • A rock mostly composed of rock fragments of volcanic origin
  • *{{quote-book
    • , year= 1897 , year_published= , author= , by= , title= The American Naturalist: An Illustrated Magazine of Natural History , url= http://books.google.com/books?id=lnIWAAAAYAAJ&pg=PA221 , original= , chapter= General Notes: Geology and Paleontology , section = No. 363 , isbn= , edition= , publisher= The Edwards & Docker Co. , location= Philadelphia , editor= Edward D. Cope and Frederick C. Kenyon , volume= 31 , page= 221 , passage= The basic volcanics are altered andesites, porphyritic diabases and andesites, and various pyroclastics . }}

    lahar

    English

    (wikipedia lahar)

    Noun

    (en noun)
  • (geology) A volcanic mudflow.
  • * 1985 , Jocelyn Thornton, Field Guide to New Zealand Geology , page 204
    • Such a highly destructive mud-flow (termed a lahar ) eventually stops as a pile of debris of all shapes and sizes, as mixed up as a glacial moraine; the two deposits have often been confused.
  • * 2000 , Jacques-Marie Bardintzeff & Alexander R. McBirney, Volcanology? , page 138
    • Pyroclastic flows are often difficult to distinguish in outcrops from a similar type of fragmental debris flow known as lahars'''''. Both are characteristically unstratified and unsorted. A deposit containing blocks of varied compositions with rounded shapes is more likely to have been formed by a ' lahar than by a glowing avalanche.
  • * 2006 , Andrew J. L. Harris et al.'', "Downstream aggradation owing to lava dome extrusion and rainfall runoff at Volcán Santiaguito, Guatemala", ''in'' William Ingersoll Rose (ed.), ''Volcanic Hazards in Central America? , page 86
    • A regime of persistent lahar activity results when eruptive activity continually supplies unconsolidated volcanic material for remobilization.

    See also

    * pyroclast ----