MODE XIV. CALCAREOUS GLUTENITE. 537 



Saussure also gives numerous other examples of 

 calcareous sandstones. 



Near Vaucluse, 1545, are beds of sandstone, OfVauciuse. 

 composed of angular and round fragments of 

 transparent white quartz, and of yellowish or 

 greenish steatite, semitransparent, in a calcareous 

 gluten. 



A sandstone, 1564, of a red wine colour, in- 

 clining to violet, very fine, and spangled with cal- 

 careous spar. It makes a warm effervescence 

 with the nitrous acid, leaving a sand of white 

 quartz, and some grains of felspar. 



A sandstone, 1487, composed of grains of 

 quartz, and a kind of red ochre, in a calcareous 

 cement. 



The sandstone of Voisy, 304, consists of 

 quartzy sand, mingled with a little clay, and 

 small specks of mica, all united by a calcareous 

 gluten, which sometimes assumes the form of 

 spar in the interstices of the beds. 



" I have seen myself," says this accurate f Recent 



formation. 



author, 305, " on the shores of the Mediter- 

 ranean, near Messina, and the noted Gulph of 

 Charybdis, sands which are moveable, when the 

 waves heap them on the shore ; but which, by 

 means of a calcareous juice which the sea infil- 

 trates at that spot, harden gradually, so as to serve 



