gypsum

So before we adapted this variable rate technology, we would drive down a row and we would put a consistent amount of amendments, whether it be gypsum, lime, soil, sulfur, we would apply that amount evenly throughout the entire vineyard block.

Geologist Carolina Cardell of Spain’s University of Granada first noticed purple stains on the gypsum in 1993, but she and her colleagues didn’t have the tools to understand the splotches back then.

Squeeze through slot canyons, marvel at sparkling walls coated with gypsum, and meander through immense underground tunnels.

Hae Won Sohn uses gypsum cement to construct small abstract sculptures that resemble rock and bone.

Workers dumped 11,000 tons of gypsum minerals into riverbeds filled with dangerously alkaline sludge to keep it from burning organisms.

Fracking, in this regard, is no different from gypsum mining, or some kinds of industrial agriculture.

The sand dunes were relentlessly mined in the past century; power lines and a gypsum plant split the park.

It is sometimes mixed with lime or gypsum, and dried with heat, and sometimes with animal charcoal or peat charcoal.

"There is an extensive underlying layer of gypsum, here," he said.

At the top there is a small aperture, which is hermetically closed with gypsum.

The difficulty of boiling them soft arises from an excess of gypsum imbibed during their growth.

The gypsum reposing on the mud is composed of plates in such close juxtaposition as to resemble an artificial pavement.