Flinn diagram (Flinn, 1962) showing the shape of miarolitic cavities. Contour is 0.1, 10, 50, 100, 150 /0.2*0.2 area.
The Flinn diagram indicates most cavities exhibit the shape of plane strain type. Although a few cavities seem to show prolate type, these may connect some cavities.
Ramsay and Huber (1983)
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