The age of planation surfaces within South America has been revised. Dominant surface which cuts Pre-Cambrian and Lower Paleolithic rocks (L. King considers the surface to be Sul-American) is proved to be Mesozoic Post-Gondwanian one. Sul-American
and younger surfaces are developed mostly on Mesozoic and Cenozoic rocks, but more widely within the limits of the Andes zone. Tectonic uplift amplitudes are defined by measurements of planation surfaces distortions, shown at the applied map with isobases
Glaciological problems set by the control of dangerous lakes in Cordillera Blanca, Peru. II. Movement of a covered glacier embedded within a rock glacier
Suggestive essay that discusses human preferences in mountain landscapes : light-colored granite rock| timberline and alpine meadow vegetation| water (tarns, streams, waterfalls)| snowcaps| ice-sculpted features| interconnected ridges. The Alps
Noranda-type massive sulphide deposits in some Archean greenstone belts of the Canadian shield occur in tholeiitic volcanic sequences, the tholeiitic rocks belong to basalt-ryholite bimodal suites with low AlO, high Na/K ratios, high iron contents
are examined and rejected. The deposit is attributed to ice-cored rock glacier development during the Late Pleistocene, and subsequent stagnation in the early Holocene.
, les côtes au vent ont une morphologie montrant l'existence de la plate-forme à vasque dans la zone des estrans, la multiplicité des beach-rocks en avant de plages partout en recul, une prolifération d'algues calcaires donnant des brisants. L'absence de
than 7 millennia of weathering, the rock surface behind the Brisingamen moraine is measurably less weathered than the surface beyond, which was last glaciated during the Rat Creek advance about 13,000 yr ago. The age of the Brisingamen moraine therefore