“…For example, significant errors are introduced in stress determinations by assuming anisotropic rocks to be isotropic (Berry and Fairhurst, 1966;Becker and Hooker, 1967; Barla and Wane, 1970). For example, significant errors are introduced in stress determinations by assuming anisotropic rocks to be isotropic (Berry and Fairhurst, 1966;Becker and Hooker, 1967; Barla and Wane, 1970).…”