River valley, longitudinal section of, [161].
Roches moutonnées, [276], [301], [367].
Rock bars, [377];
cut through by gorges, [378].
Rock basin lakes, [376], [377], [400], [412].
Rock cleavage, [44].
“Rock glaciers”, [153].
“Rocking stones”, [306].
Rock mantle, [155];