﻿Anhydrite in Ontario. 6.1 



Anhydrite in Ontario. 



By Professor W. Nicol. 



Eecently, while visiting the dump of the abandoned 

 Foxton Phosphate Mine with a party of students from 

 the Mining School at Kingston, an unfamiliar mineral 

 was picked up. After returning, Mr. Miller, the Lecturer- 

 on Geology, subjected the specimen to an examination^ 

 with the blowpipe, and determined it to be anhydrous 

 calcium sulphate. An analysis was made with the follow- 

 ing result : — 



CaO 4h72 per cent. 



SO3 57.47 



CO2 286 



SiO^ 151 



FeA 065 



Loss on ignition .26 



99.952 per cent. 



The mine is situated in the Township of Loughborough,, 

 County of Frontenac, not far from the Village of Syden- 

 ham. 



The mineral occurs in considerable quantities, closely- 

 associated with transparent selenite, gypsum, calcite, and 

 pyroxene. In appearance the mineral somewhat resembles 

 pink fluorite. It shows the three pinacoidal cleavages and 

 the pearly lustre on the basal plane. Between the layers 

 of the mineral, thin flakes of calcite occur in the same 

 way as they do between the folise of mica, which is found 

 at the same dump. 



The anhydrite from this locality bears a very strong 

 resemblance to that seen in museums from Hall, Tyrol,, 

 and labelled " Muriacite." 



Laboratory, School of Mining, 

 Kingston. 



