The latest Pleistocene cryomere in the region of 'kopjes' and the big mesetas, Patagonia, Argentina

DARIO TROMBOTTO; BERND STEIN

VI International Conference on Permafrost

South China University of Technology Press

Lugar: Beijing, China; Año: 1993; p. 1238 - 1241

In the northern area of south Patagonia, near - the 46º S and at different sites we find clear cryogenic structures that prove the, activity of freezing and thawing of the latest cryomere during the Pleistocene in Patagonia. The profiles show ice wedge-casts. At the flanking sides of the "Pampa del Castillo" the head penetrates into the Tertiary forming droplike subhorizontal involutions. An intermediate clay-layer could indicate a possible interstadial. Paleoclimatic and sedimentary indicators express conditions of coldness which aIe ameliorating towards the Holocene Age and a predominantly dry environment with a strong participation of the wind.