It has been found difficult to explain the presence of the Alunite except through the agency of surface oxidizing waters acting on hydrogen sulphide coming from below.
"The Economic Aspect of Geology"
C. K. Leith
Of other natural mineral sources, Alunite is the most important.
"The Economic Aspect of Geology"
C. K. Leith
Alunite occurs as veins and replacement deposits, often in igneous associations, and is supposed to be of igneous source.
"The Economic Aspect of Geology"
C. K. Leith