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Brownsburg-Chatham, Argenteuil RCM, Laurentides, Québec, Canada

 

Quarry entrance

Foucault Quarry, Brownsburg-Chatham, Argenteuil RCM, Laurentides, Québec, Canada


The quarry is easily located, on the right side of a country road named montée Wert, less than a kilometer North of the small village of Ogdensburg.

The West wall

Foucault Quarry, Brownsburg-Chatham, Argenteuil RCM, Laurentides, Québec, Canada


A fracture running diagonally from the base of the wall to the upper right side, is visible in the center of the picture.

5H4-33MFluorite CaF₂ , Pyrite FeS₂ , Calcite CaCO₃

Foucault Quarry, Brownsburg-Chatham, Argenteuil RCM, Laurentides, Québec, Canada


This picture was taken April 14th, 2011.

It shows a massive calcite vein, with enclosed crystallized green fluorite, and pyrite, partly massive and also as hemispheric nodules.

Cavities in a block

Foucault Quarry, Brownsburg-Chatham, Argenteuil RCM, Laurentides, Québec, Canada


This picture was taken November 15th, 2011.

Further to a large blast, dozens of small blocks such as this one were scattered all around the surface of the blast pile. The crowbar in this picture is only 40 cm (16 inch) long, so the rock specimen is around that size.

It shows multiple cavities, the largest on at bottom left showing a broken pale green fluorite crystal, and (barely visible) millimeter-sized quartz crystals.

The cavity at right contains two corroded pyrite hemispheres.