Alum has been manufactured in the past from pyritiferous
shales of Gajbeds from Maki Nai, shales of Ranikot group and Nari/Gaj group and at Shah Hassan near Trimi.
Lithic clasts in boulder, cobble, pebble, and granule conglomerates of the proximal Daggett Ridge Formation were derived from Late Cambrian through Early Ordovician sedimentary and volcanic rocks of the Miramichi terrane and are also present locally in dark grey to pebble conglomerate and lithic sandstone of the Mill Privilege Brook Formation (along with black pyritiferous
The rock [matrix] is a crystalline limestone, with layers of black pyritiferous
At the famous Muzo mines, the emeralds reside in deep veins of calcite, which crisscross Lower Cretaceous argillites and layers of black, pyritiferous
This package is overlain to the east by additional Tetagouche Group rocks including pyritiferous
black shale intercalated with felsic volcanic rocks and mafic volcanic rocks of the Hayden Lake Formation as well as wacke and shale of the Push and Be Damned Formation (Fig.
marble was obviously avoided, whenever possible, by the stonemasons.] Unless it is found in a purer state on further examination, it cannot be advantageously used for architectural purposes.
Cross-laminated, fine- to medium-grained, poorly sorted, pyritiferous
metasandstone beds, up to 30 cm thick, are locally present (Fig.
On Campobello Island it consists of locally pyritiferous
, black to grey siltstone, lithic sandstone, shale and argillite intercalated with thick (up to several tens of metres) units that contain vesicular flows, agglomerate and/or well-developed hyaloclastite sequences.
Black shale beds, which are less common in the section, are highly carbonaceous and pyritiferous
. The Bright Eye Brook Formation is estimated to b e 200 m thick using a dip of 80[degrees] in the section on Rte.