Anhydrite has been noted by Cummings (1987) as rare, but no specimens attributable to the Fanwood quarry have been seen by the author.
The K3 and K4 layers mainly consist of
anhydrite, dolomite and limestone.
Formation of
anhydrite and gypsum occurs mostly in the upper intertidal and supratidal environments, just centimeters above mean tide level.
For the first possibility (conformable boundary), the growth of bedded nodular
anhydrite in interval (a) could be interpreted as an early diagenetic product.
The key to the creation of black smoker chimneys is an unusual chemical property of the mineral
anhydrite, or calcium sulfate (CaS[O.sub.4]).
Anhydrite, which is unstable in ambient temperature sea water, quickly dissolves, leading to cavities which promote mound collapse and sea water penetration, which further increases metal release.
The Salado Formation, or main salt, consists of thick halite intervals with interbedded
anhydrite, siltstone and polyhalite.
(AWC), an
anhydrite, gypsum and limestone producer with a quarry and downstream production facility in Carson City, Nev., and additional owned reserves under development nearby.
The Rus, like the older Hith
anhydrite, loses its evaporitic character to the east.
Six years ago 3,200 people objected to filling Billingham
anhydrite mine with non-toxic waste.