单词 | to lens out |
释义 | > as lemmasto lens out to lens out (intr.): of a body of rock: to become gradually thinner (along a particular direction) to the point of extinction. ΘΚΠ the world > the earth > structure of the earth > structural features > sedimentary formation > [verb (intransitive)] > narrow to wedge out1819 pinch1867 to lens out1921 1921 G. H. Cox et al. Field Methods Petroleum Geol. 11 The effects of irregularities in sands may be considered to be of three types; those in which the sand lenses out entirely, those in which it loses its porosity, and those in which the porous sand continues but is of changing thickness. 1965 G. J. Williams Econ. Geol. N.Z. viii. 108/2 Mining went down to the 500-ft level below which the calcite bodies themselves lens out—as proved by angled diamond drill-holes. < as lemmas |
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