Martonne, E. de, cited, [7], [195], [222], [382].
Massive structure, of rocks, [31].
Master joints, [56].
Matavanu, eruption in 1906, [110], [113], [147].
Mat of vegetation, shield to lithosphere, [155].
Matthes, F. E., cited, [7], [371], [381].
Maturity, of upland, [170].
Mauna Loa, [106];
eruptions of, [109].
Meander scars, [165].