Crossword-Solution: HYDROUS 7 letters, 5 clues 🏆 scrabble score: 14

The porphyritic lavas are highly amygdaloidal, both on their upper and lower surfaces; they consist chiefly of claystone porphyry, but with one common variety, like some of the streams at the Puente del Inca, having a grey mottled basis, abounding with crystals of red hydrous oxide of iron, green ones apparently of epidote, and a few glassy ones of feldspar.

Back at last in his own laboratory, Craig set to work on the brewer's yeast, deriving something from it by the plentiful use of a liquid labeled "Lloyd's reagent," a solution of hydrous aluminum silicate.

The veinstone is pure quartz containing water in microscopical cavities, as in the quartz crystals of granite, but not combined as in the hydrous siliceous sinter deposited from hot springs.

This was probably the work of an earthquake which we felt at Sharm Dumayghah on March 22nd.[EN#146] The track then strikes the modern Hajj-road, which runs west of and close to the Sulphur-hill; the line is a succession of watercourses,[EN#147] and in Wady Khirgah we found blocks of the hydrous silicate, corundophyllite which may be Serpentine: it is composed of a multitude of elements, especially pyrites.

Apparently the special character which distinguishes laterite from other forms of red-coloured weathering is the presence of hydrous oxide of alumina in varying proportions.