The strength of Adirondack anorthosite decreases with increasing temperature and increases with increasing confining pressure during deformation tests at 25°C and 0.5 to 1 kb and from 400°C to 1000°C at 5 to 17 kb with a strain rate of ca. 10-5/second. Strength values range from over 20 kb at low temperatures to less than 1 kb in some high temperature tests. Cataclasis is the dominant mode of deformation in all tests although plastic flow occurs with increasing abundance at 800°C and above.
Strength of experimentally deformed Adirondack anorthosite