For eight month in 1783-84, the Laki volcanic fissure system
in Iceland spewed over 100 million tons of sulphur dioxide into the atmosphere.
The first one follows the fissure system
of WNW-ESE direction and is situated approximately up-right to the slope.
Before sealing, each fissure system
was cleaned of any plaque residue by bristle brush and prophylactic paste.
The images showed geological evidence of catastrophic floods caused by volcanic activity in a fissure system
called the Cerberus Fossae.
This test showed that use of etch and Prime and Bond[R] was significantly more likely to result in placement of a FS which remained covering more of the pit and fissure system
over a 12 month period than use of Xeno[R] III for enamel preparation.
Most significant is the fissure system
of complementary directions NNE-SSW and ESE-WNW, which also shapes outer form of the Brana outcrop (Fig.
Vaaldiam also recently acquired a 60% interest in the Brauna diamond property in the state of Bahia, where three diamondiferous kimberlite pipes have been discovered in association with a 15 kilometre long kimberlite fissure system
Exploration sampling has traced the kimberlite fissure system
over a distance of 15 kilometers.
The surface blasting exposed new geologic strata which, in spite of an altered sub-horizontal fissure system
(carbonates and sulphides), showed the presence of many mineralized translucid quartz veins, containing pyrite and pyrrhotine.
A series of kimberlite fissure systems
are known to exist on the Property and a kimberlite pipe associated with the fissure system
has been mined for diamonds in the past.
The discovery of the diamondiferous Aquila kimberlite and an associated fissure system
, clearly indicates the potential for additional kimberlites on the Roundrock property.
Drill hole information to date indicates that the total width of the fissure system