puits (1) territoire (1) enquête (1) état (1) fleuve (1) minéral (1) cartographie (cartes) (1) paysage (1) relief (1) fossile (1) champ (1) exploration (1) évolution (1) érosion (1) point (1) Composition (1) Aspect (1) Altitudes (1) Observations (1) Observations (1) Uplands (1) Minerals (1) Horizon (1) Ferralsols (1) Valleys (1) Surfaces (1) Soils (1) Shields (Geology) (1) Science (1) Quartz (1)