Flinn diagram

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Flinn diagram A graphical representation of the full range of three-dimensional strain states in deformed rocks, with or without a change in their volume. The diagram plots a value for the principal strain axes Y/Z against X/Y of ellipsoids (see STRAIN ELLIPSOID) which result from dilation and/or distortion of a reference sphere. The data plotted on the diagram are obtained from analyses of strain using strain markers.