nodular phosphorite

См. также в других словарях:

• phosphorite — phosphoritic /fos feuh rit ik/, adj. /fos feuh ruyt /, n. a sedimentary rock sufficiently rich in phosphate minerals to be used as a source of phosphorus for fertilizers. [1790 1800; PHOSPHOR + ITE1] * * * or phosphate rock Rock with a high… …   Universalium

• sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium