May 1, 2000
Bonjour all (yes, that's for men and women),
More grist for Dugald (Carmichael's) mill:
Since the time of Sir Wm. E. Logan, in the mid-19th century, the
conspicuous brown phyllosilicate in low-grade schists exposed around
St-Pierre-de-Broughton (once an important copper district) in the Québec
Appalachians was routinely identified as biotite. Voilà, it is mostly
stilpnomelane ('Canadian Mineralogist', v. 22 (1984), pp. 423-435).
Tomas Feininger
Geologist
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