INVESTIGADORES
PERUCCA Laura Patricia A.
artículos
Título:
A preliminary inventory of Periglacial landforms in the Andes of La rioja and San Juan, Argentina. at about 20ºS.
Autor/es:
PERUCCA, L., ESPER ANGILLIERI, M. Y
Revista:
QUATERNARY INTERNATIONAL
Editorial:
Elsevier
Referencias:
Lugar: Holanda; Año: 2008 p. 10 - 20
ISSN:
1040-6182
Resumen:
Abstract
The Cerro El Potro and nearby mountain chains belong to the Andean Frontal Cordillera (281S). Cerro El Potro is a glaciated
mountain that is surrounded by huge valleys both on its Chilean and Argentinean flanks. Its southern limit is a steep rock wall towards
the trough-shaped Rý´ o Blanco valley in Argentina, with a wide valley floor. The other sides of the mountain are characterized by welldeveloped Pleistocene cirques. The predominant landforms in this area have been shaped in a periglacial environment superimposed on
an earlier glacial landscape. It is a region with abundant rock glaciers, a noteworthy rock glacier zone, but nevertheless, it is a relatively
little known area in South America. In this preliminary inventory, the landforms surveyed were mainly gravitational in origin, including
valley rock glaciers, talus rock glaciers, debris cones, landforms originated by solifluction processes and talus detrital sheets on mountain
sides. Ancient moraine deposits have been found on the sides of the main rivers that cross the area form west to east, including the Blanco
and Bermejo rivers. Present day fluvial activity is limited, and restricted to these main rivers. In this area of glacial valleys and small
cirques, there are small lakes and other water bodies, grass covered patches and zones with high mountain vegetation. Present day glacial
activity is restricted to the highest part of the area, above 5500m a.s.l., mainly in the Cerro El Potro (5879 m) where a permanent ice field
exists, as well as small mountain glaciers.
Published by Elsevier Ltd.
mountain that is surrounded by huge valleys both on its Chilean and Argentinean flanks. Its southern limit is a steep rock wall towards
the trough-shaped Rý´ o Blanco valley in Argentina, with a wide valley floor. The other sides of the mountain are characterized by welldeveloped Pleistocene cirques. The predominant landforms in this area have been shaped in a periglacial environment superimposed on
an earlier glacial landscape. It is a region with abundant rock glaciers, a noteworthy rock glacier zone, but nevertheless, it is a relatively
little known area in South America. In this preliminary inventory, the landforms surveyed were mainly gravitational in origin, including
valley rock glaciers, talus rock glaciers, debris cones, landforms originated by solifluction processes and talus detrital sheets on mountain
sides. Ancient moraine deposits have been found on the sides of the main rivers that cross the area form west to east, including the Blanco
and Bermejo rivers. Present day fluvial activity is limited, and restricted to these main rivers. In this area of glacial valleys and small
cirques, there are small lakes and other water bodies, grass covered patches and zones with high mountain vegetation. Present day glacial
activity is restricted to the highest part of the area, above 5500m a.s.l., mainly in the Cerro El Potro (5879 m) where a permanent ice field
exists, as well as small mountain glaciers.
Published by Elsevier Ltd.
mountain that is surrounded by huge valleys both on its Chilean and Argentinean flanks. Its southern limit is a steep rock wall towards
the trough-shaped Rý´ o Blanco valley in Argentina, with a wide valley floor. The other sides of the mountain are characterized by welldeveloped
Pleistocene cirques. The predominant landforms in this area have been shaped in a periglacial environment superimposed on
an earlier glacial landscape. It is a region with abundant rock glaciers, a noteworthy rock glacier zone, but nevertheless, it is a relatively
little known area in South America. In this preliminary inventory, the landforms surveyed were mainly gravitational in origin, including
valley rock glaciers, talus rock glaciers, debris cones, landforms originated by solifluction processes and talus detrital sheets on mountain
sides. Ancient moraine deposits have been found on the sides of the main rivers that cross the area form west to east, including the Blanco
and Bermejo rivers. Present day fluvial activity is limited, and restricted to these main rivers. In this area of glacial valleys and small
cirques, there are small lakes and other water bodies, grass covered patches and zones with high mountain vegetation. Present day glacial
activity is restricted to the highest part of the area, above 5500m a.s.l., mainly in the Cerro El Potro (5879 m) where a permanent ice field
exists, as well as small mountain glaciers.
Published by Elsevier Ltd.
1S). Cerro El Potro is a glaciated
mountain that is surrounded by huge valleys both on its Chilean and Argentinean flanks. Its southern limit is a steep rock wall towards
the trough-shaped Rý´ o Blanco valley in Argentina, with a wide valley floor. The other sides of the mountain are characterized by welldeveloped
Pleistocene cirques. The predominant landforms in this area have been shaped in a periglacial environment superimposed on
an earlier glacial landscape. It is a region with abundant rock glaciers, a noteworthy rock glacier zone, but nevertheless, it is a relatively
little known area in South America. In this preliminary inventory, the landforms surveyed were mainly gravitational in origin, including
valley rock glaciers, talus rock glaciers, debris cones, landforms originated by solifluction processes and talus detrital sheets on mountain
sides. Ancient moraine deposits have been found on the sides of the main rivers that cross the area form west to east, including the Blanco
and Bermejo rivers. Present day fluvial activity is limited, and restricted to these main rivers. In this area of glacial valleys and small
cirques, there are small lakes and other water bodies, grass covered patches and zones with high mountain vegetation. Present day glacial
activity is restricted to the highest part of the area, above 5500m a.s.l., mainly in the Cerro El Potro (5879 m) where a permanent ice field
exists, as well as small mountain glaciers.
Published by Elsevier Ltd.