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Lapilli
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- Literally, "little stones;" round to angular rock fragments measuring 1/10 inch to 2-1/2 inches in diameter, which may be ejected in either a solid or molten state.
- Non or slightly vesicular pyroclastics, 2.0 to 76 mm in at least one dimension, with an apparent specific gravity of 2.0 or more. compare - ash [volcanic], block [volcanic], cinders, tephra. kst
- Pyroclastic rock material of gravel size (i.e. 2 to 60mm).
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Вулк. лапилли, русский
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Pyroclastics, английский
Pyroclastic, английский
- Pertaining to fragmented (clastic) rock material formed by a volcanic explosion or ejection from a volcanic vent.
- An igneous rock composed of angular rock fragments that originate from a volcanic explosion.
- (adj.) pertaining to clastic rock particles produced by explosive, aerial ejection from a volcanic vent. such materials may accumulate on land or under water. compare - epiclastic, volcaniclastic, clastic. g. smith & hp
- General term for any rock composed of material ejected explosively from
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Weathering (surface), английский
Making little ones out of big ones. waethering includes the processes which mechanically and chemically break down the mountains into little pieces, so they can be eroded and transported to the beach (see strickler`s 3rd law of geofantasy).
Pumice, английский
- Light-colored, frothy volcanic rock, usually of dacite or rhyolite composition, formed by the expansion of gas in erupting lava. commonly seen as lumps or fragments of pea-size and larger, but can also occur abundantly as ash-sized particles.
- Lava having a highly porous, loose, spongy, or cellular structure; of relatively high silica content; used in powdered form as an abrasive in polishing, etc.
- Пемза pump насос
- (a) [soils] rock fragments > 2 mm in diameter (i.e., retained upon a 2 mm sieve), or coherent rock layers (pumice flow), made of light-colored, vesicular, glassy rock commonly having the composition of rhyolite. the material commonly has a specific gravity of < 1.0 and is thereby sufficiently buoyant to float on part 629 - glossary 629-62 (430-vi-nssh, 2008) water. sw; pumice-like fragments < 2 mm in size are called pumiceous ash. st; compare - scoria, tephra; (b) [geology] same as (a) but does not include any size restrictions. sw.
- Light-coloured glassy rock formed from acid lava. contains abundant
- Porous and lightweight, pumice physically lifts away dead skin cells from the topmost layer of skin for soft, smooth skin. it`s even known to help remove calluses and rough patches. you`ll find it in many body care exfoliators, like scrubs and body washes. find it in our buff it out aha exfoliating body scrub.
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