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Перевод: siliceous
[прилагательное] кремнистый; содержащий кремний
Тезаурус:
- Not until rock-drills became available which injected a spray of water into the shot-hole together with the air which expelled the dust, did drilling in siliceous rock become reasonably safe.
- Festuca ovina - Agrostis capillaris - Galium saxatile grassland (siliceous grassland).
- The rate for siliceous Oozes ranges from as little as 0.05 grammes per square centimetre per thousand years in the tropics, to as high as 50 grammes in the Gulf of California.
- This great plate - adorned with a few "hot spots", where plumes of magma have spurted to the surface randomly to form such agglomerations of islands as the Hawaiian chain, the Marquesas, the Tuamotos, the Tubuais and that tiny British possession the Pitcairn group - is almost universally deep, has a floor covered with siliceous oozes and red clays and is dotted with millions of volcanic abyssal hills discovered by the trailing of arrays of echo-sounders.
- VERZENAY: Complex structure of interbedded subsoils: Belemnite and two forms of Micraster chalks, calcareous-silty deposits, fine gravelly beds, various layers of ferrous siliceous pebbles and colluvial deposits of ferrous-brown flint-bearing clay.
- The continental shelf has a covering of fine muds, derived mainly from the great continental rivers, and siliceous diatom shells from the plankton.
- The work presented here is concerned entirely with the bone beds in the breccias, which are identified as part of the Calcareous Member of the Westbury Formation (the other member being the Siliceous Member encompassing the basal sands and gravels).
- Siliceous crusts, or silcretes, are much more durable, but seem to be mainly if not entirely relict features.
- Further north the mud is siliceous, enriched by a constant rain of diatom casings from the phytoplankton.
- It is frequently found also as siliceous internal moulds.
- Siliceous spicules of demosponges occur in strata in Iran that may be of Ediacaran age, and claims for Precambrian sponge spicules need re-examination, especially as protistan biomineralization, possibly of silica, is known from the preceding Riphean Period (Fig. 1).
- Peels are mostly used for limestones and calcite-cemented clastic rocks, although cherts and siliceous clastics can be successfully treated.
- The Klasies River Mouth site is made to sound almost idyllic by Ronald Singer and John Wymer, who excavated there during two seasons from 1966 to 1968: "while the sea was close, the attractions of the site were numerous: an almost unlimited supply of shellfish; large and small mammals available for hunting in the immediate hinter land and at watering places along the adjacent river; abundant fresh water; seals, dolphins and fishes from the sea; marine birds to be caught easily on the beach; natural caves and rock shelters for protection; and an unlimited supply of good quality siliceous quartzite for making tools and weapons.
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