Pyrargyrite was a dominant mineral, occurring locally in vuggy masses, in the Cortland mine, Gunnison County.
Very narrow vugs containing quartz crystals are encountered in the quartz seams at times, but these invariably are barren of gold.
It is believed that the gels have not chemically degraded, but that the water eventually finds another fracture or vugular system to travel through.
It occurred as a fine-grained siliceous vein filling and as discrete, clear, tiny crystals in vugs .
Small pegmatites within the granite are locally abundant and have furnished a large number of minerals from pockets and associated vuggy zones.
The product is effective when drilling formations that are fractured or vugular and when drilling highly porous formations.
Rock with cavernous or vugular porosity occurs only in a few thin zones in the Floridan aquifer system, except in the Lower Floridan aquifer.
The banded quartz is fascinating to study; euhedral crystals originally deposited in vugs and cavities were repeatedly covered with thin bands of agate.
We then obtain micro-scale computations of flow in such vugular media on very fine grids that resolve the geometry of the vugs.
Unlike the vein deposits, the metasomatic flats are frequently vuggy and are the source of most crystallized mineral specimens from the district.