"Grauwacke" Quotes from Famous Books
... same numberless varieties as that above the cataract of the Nile, and near Assouan; and the same beautiful specimens of red, rose-coloured, and almost purple may be collected here, as in that part of Egypt. The transition from primitive to secondary rocks, partaking of the nature of gruenstein or grauwacke, ... — Travels in Syria and the Holy Land • John Burckhardt |