MINERALOGY. i 3 



SECT. VI. 



II. Friable and Compact, folida friahilis *. 



Chalk, Creta. 



■ . _. 



a. White, Creta alba^ is found in England, 

 France, and in the province of Skone in Swe- 

 den, in which laft place it is only found adhe- 

 rent to flint. In the two firft kingdoms there 

 are large itrata of this fubftance, in which 

 flint is imbedded. This feems to indicate, that 

 the loofe flints, or thofe difperfed on the fur- 

 face of the earth, have been by fome caufes 

 carried from their native beds \ but, as yet, 

 no one can prove, that chalk and flint are of 

 the fame conitituent parts. 



Chalk is, however, a vague name, alfo 

 applied to other earths ; whence we hear of 

 chalks of various colours : but I do not 

 know of any which are of a calcareous na- 

 ture, except this only kind here defcribed, 

 and of which there are no other varieties, 

 otherwife than in regard to the loofenefs of 

 the texture, or the finenefs of the particles. 



SECT. VII. 



III. Indurated, or Hard, Terra calcarea indu- 

 rata. Limeftone, Lapis calcareus. 



A. Solid, of no vifible particles, or not granu- 

 lated, parti cults impalpabilibus. 



This kind varies in regard to hardnefs and co- 

 lour, for inftance, 



a. White, from Hull in England. 



* S'Jida friabilis feems con trad iclory and inexplicable; 

 however, I fhail ftri6tly adhere to the Author's definitions, 

 though never To faulty, ai I only tranfiate the work. D. C. 



b. Whitift 



