3 adjectives to describe sludges

Some persons add about half an ounce of flowers of brimstone to the above proportions, and a little sludge from the grindstone trough.

Hitherto it has been found that of all the appliances and methods for separating the liquid from the solid matters, whether it is in the case of effluents from tanneries and other manufactories, or the ocherous and muddy sludges taken from the settling tanks in mines, some of which contain from 90 to 95 per cent.

But during the winter, when the stream-banks are embossed in snow, and the streams themselves are chilled nearly to the freezing-point, so that the snow falling into them in stormy weather is not wholly dissolved, but forms a thin, blue sludge, thus rendering the current opaquethen he seeks the deeper portions of the main rivers, where he may dive to clear water beneath the sludge.

3 adjectives to describe  sludges