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" is specked throughout, but very irregularly, with pyrites, mispickel, and black and grey copper ores, whilst occasionally these metallic sulphides and oxides are accumulated in "
Transactions of the Royal Geological Society of Cornwall - Pagina 41
door Royal Geological Society of Cornwall - 1875
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Special Reports on the Mineral Resources of Great Britain ...

Geological Survey of Great Britain - 1920 - 776 pagina’s
...some parts " intermingled with schistose bands of matted pale-green actinolite." This thick band .... is specked throughout, but very irregularly, with...these metallic sulphides and oxides are accumulated in strings running sometimes with, but often qtiite against, the direction of the stratification." These...
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Special Reports on the Mineral Resources of Great Britain ...

Geological Survey of Great Britain - 1922 - 1000 pagina’s
...some parts ' intermingled with schistose bands of matted pale-green actinolite.' ' This thick band is specked throughout, but very irregularly, with...these metallic sulphides and oxides are accumulated in strings running sometimes with, but often quite against, the direction of the stratification.' From...
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