In the centre of a pumice-covered plateau from loon to 2000 ft. In 1886 there was a serious volcanic eruption in the outlying island of Nivafoou, and at the same time Falcon Reef, normally awash at high water, discharged sufficient scoriae and pumice to form a new island 50 ft.
The superior facet, also called the superior articular process, is a pair of facet joints between pairs of vertebrae. A facet joint is what holds two vertebrae together and each vertebra contains two pairs, an upper-facing superior facet pair and a lower-facing inferior facet pair.
Facet arthropathy Causes. 1  The real cause of facet arthropathy is yet to be diagnosed but generally it is observed that degeneration of facet joints is the main cause of it. 2  Fracture or torn ligaments may also be a reason. 3  Reduction of space between two vertebrae that compels facet joint to rub against each other.acet arthropathy Causes. 1  The real cause of facet arthropathy is yet to be diagnosed but generally it is observed that degeneration of facet joints is the main cause of it. 2  Fracture or torn ligaments may also be a reason. 3  Reduction of space between two vertebrae that compels facet joint to rub against each other.