The Mount-Tarrangower Gold-field lies about eighty-five miles due N.W. of Melbourne, at a mean elevation of 1200 feet above the level of the sea. Mount Tarrangower, from which the field derives its name, is a fine, massive, symmetrical hill, 1844 feet above the level of the sea by barometric measurement, thus rising several hundred feet above the level of the surrounding hilly country, and forming a conspicuous landmark for a great distance round. It and its eastern, northern, and southern spurs consist mainly of bluish-grey, hard, metamorphic Lower-Silurian Sandstone (“Hornfels”) which crops out in beds, generally thick, but much cleaved, showing a mean strike of N. 12° W., and an easterly dip of 70°–80°.