| 单词 | calcareous spar | 
| 释义 | > as lemmascalcareous spar  b.   calcareous earth = lime, chalk;  calcareous spar = calc-spar n.;  calcareous tufa = calc-tuff n. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > 			[noun]		 > chalk or limestone chalkc893 caukc1440 calcareous earth1757 1757    W. Watson in  Philos. Trans. 1756 		(Royal Soc.)	 49 896  				Ten grains of calcarious earth. 1799    Med. & Physical Jrnl. 1 255  				Chalk, or calcareous earth. 1816    Sir H. Davy in  Faraday Exp. Res. 4  				Calcareous tufas..found in every part of Italy. 1816    R. Jameson Treat. External Characters Minerals 		(ed. 2)	 104  				Hexahedron is a solid, having of six quadrilateral planes and eight angles. .. Examples, calcareous-spar and fluor-spar. < as lemmas | 
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