important as rock makers, [456-461];

properties of, [26], [27];

quick determination of, [449].

Mississippi River, [167].

Mitchell, G. E., cited, [157].

Moats, about nunataks, [273], [274].

Models, laboratory, for study of geological maps, [63].

Mojsisovics von Mojsvár, E., cited, [228].

Mokuaweoweo, crater of, [106].

“Mole-hill” effect, after earthquakes, [73].