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Pyroclastic vs Siltation - What's the difference?

pyroclastic | siltation |

As nouns the difference between pyroclastic and siltation

is that pyroclastic is a rock mostly composed of rock fragments of volcanic origin while siltation is the (typically undesirable) increase in concentration and or of deposition of water-borne silt in a body of water.

As an adjective pyroclastic

is (vulcanology) 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 . }}

    siltation

    English

    Noun

    (en-noun)
  • The (typically undesirable) increase in concentration and or of deposition of water-borne silt in a body of water.
  • *{{quote-news, year=2009, date=March 20, author=Somini Sengupta, title=In Silt, Bangladesh Sees Potential Shield Against Sea Level Rise, work=New York Times citation
    • , passage=They are also heavily engineered upstream: a dam built upstream in neighboring India can critically stanch the flow of freshwater down here, increasingly the chances of salinity and siltation . }}

    See also

    *(Siltation)