August Karl Rosiwal (2 December 1860 – 9 October 1923) was an Austrian geologist.
From 1918 until his death in 1923, he was administrator of the "Geological Institute of the University of Vienna", following his mentor Franz Toula.
He conducted a comprehensive dating, geological details of Austria.
The Rosiwal method (also called Delesse and Rosiwal)[2] attempts to perform a quantitative analysis of the amounts of individual minerals that make up a rock (see modal analysis).
It consists of calculations based on proportions drawn lines very close together and act on the different materials, this measure is calculated proportionally to the area and volume of each material.