earthquake, plan of, [76], [78];

illusory nature of, [59];

methods of detecting, [59];

post-glacial, [74];

relation of escarpments to, [60];

shown by changes in strike and dip, [61];

shown by offsets, [61].

Feldspars, [456].

Fenneman, N. M., cited, [424], [425].

Festoons of mountain arcs, [435], [436].