Guide books of excursions in Canada1-10 . Legend £ m Granite and ap/ite ii ? Diabase breccia, h ? Serpentine and pendo ? Undifferentiated, largely s Chromite [?] Asbestos Route map between Thetford and Co/erair,Miles H3 surrounding a core of peridotite. Where all of theseclasses of veins are found together, a very intricate net-w<~ results, but by careful observation many of them canlm- *?*. ired to one or other of these clasess. rihe determination of other causes of the shatteringof the rock, such as hydration, rapid cooling, and, possibly,original gneissic structure near the
Guide books of excursions in Canada1-10 . Legend £ m Granite and ap/ite ii ? Diabase breccia, h ? Serpentine and pendo ? Undifferentiated, largely s Chromite [?] Asbestos Route map between Thetford and Co/erair,Miles H3 surrounding a core of peridotite. Where all of theseclasses of veins are found together, a very intricate net-w<~ results, but by careful observation many of them canlm- *?*. ired to one or other of these clasess. rihe determination of other causes of the shatteringof the rock, such as hydration, rapid cooling, and, possibly,original gneissic structure near the edge of an intrusion,requires a full investigation covering the entire processof serpentinization. Mining and Milling of the Asbestos-Bearing Rock. All the mines are worked by open-cut methods. Theground at the bottom of the pit is usually cut into a seriesof benches, generally about 8 to 15 feet (2-4 to 4-5 m.)high, which afford a number of faces from which the rockcan be quarried at the same time. At the Bell mine,Thetford,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgeology, bookyear1913
