Definitions for pyroclastic
ˌpaɪ rəˈklæs tɪkpy·ro·clas·tic

WiktionaryRate this definition:0.0 / 0 votes

1. pyroclasticadjective

   Mostly composed of rock fragments of volcanic origin

2. Etymology: From clastic, from πῦρ, and κλαστός.

WikipediaRate this definition:0.0 / 0 votes

1. pyroclastic

   Pyroclastic rocks (derived from the Greek: πῦρ, meaning fire; and κλαστός, meaning broken) are clastic rocks composed of rock fragments produced and ejected by explosive volcanic eruptions. The individual rock fragments are known as pyroclasts. Pyroclastic rocks are a type of volcaniclastic deposit, which are deposits made predominantly of volcanic particles. 'Phreatic' pyroclastic deposits are a variety of pyroclastic rock that forms from volcanic steam explosions and they are entirely made of accidental clasts. 'Phreatomagmatic' pyroclastic deposits are formed from explosive interaction of magma with groundwater.Unconsolidated accumulations of pyroclasts are described as tephra. Tephra may become lithified to a pyroclastic rock by cementation or chemical reactions as the result of the passage of hot gases (fumarolic alteration) or groundwater (e.g. hydrothermal alteration and diagenesis) and burial, or, if it is emplaced at temperatures so hot that the soft glassy pyroclasts stick together at point contacts, and deform: this is known as welding.One of the most spectacular types of pyroclastic deposit is an ignimbrite, which is the deposit of a ground-hugging pumiceous pyroclastic density current (a rapidly flowing hot suspension of pyroclasts in gas). Ignimbrites may be loose deposits or solid rock, and they can bury entire landscapes. An individual ignimbrite can exceed 1000 km3 in volume, can cover 20,000 km2 of land, and may exceed 1 km in thickness, for example where it is ponded within a volcanic caldera.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Pyroclastic

   pī-rō-klas′tik, adj. formed by volcanic agencies. [Gr. pyr, fire, klastos, broken.]

How to pronounce pyroclastic?

1. Alex

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   Mark

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   Daniel

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   Libby

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How to say pyroclastic in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of pyroclastic in Chaldean Numerology is: 9

2. Pythagorean Numerology

   The numerical value of pyroclastic in Pythagorean Numerology is: 6

Examples of pyroclastic in a Sentence

1. Eddy Sanchez:

   Temperatures in the pyroclastic flow can exceed 700 degrees (Celsius) and volcanic ash can rain down on a 15 kilometer (9.32 miles) radius. That could cause more mud flows and nearby rivers to burst their banks.

2. Eddy Sanchez:

   Currently the volcano continues to erupt and there exists a high potential for (pyroclastic) avalanches of debris.

3. Eddy Sanchez:

   Temperatures in the pyroclastic flow can exceed 700 degrees (Celsius) and volcanic ash can rain down on a 15-km (9-mile) radius. That could cause more mud flows and nearby rivers to burst their banks.

4. David Horvath:

   This feature overlies the surrounding lava flows and appears to be a relatively fresh and thin deposit of ash and rock, representing a different style of eruption than previously identified pyroclastic features, this eruption could have spewed ash as high as 6 miles into Mars' atmosphere. It is possible that these sorts of deposits were more common but have been eroded or buried.

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References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Pyroclastic
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Pyroclastic
3. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=pyroclastic