(Table 2) Properties of relict ice and sand wedges from six sites near Rio Gallegos, southern Patagonia ...

• Main Authors: Bockheim, James G, Coronato, A, Rabassa, J, Ercolano, B, Ponce, J
• Format: Dataset
• Language: English
• Published: PANGAEA 2009
• Subjects: ipy; Area/locality; Surface description; Sediment type; Embedding material; Sample type; Description; Frequency; Height; Width; Ratio; Stage; Soil reaction/conductivity; Texture; Color description; Structure; Munsell Color System 1994; International Polar Year 2007-2008 IPY; International Polar Year; IPY
• Online Access: https://dx.doi.org/10.1594/pangaea.786099; https://doi.pangaea.de/10.1594/PANGAEA.786099

Relict sand wedges are ubiquitous in southern Patagonia. At six sites we conducted detailed investigations of stratigraphy, soils, and wedge frequency and characteristics. Some sections contain four or more buried horizons with casts. The cryogenic features are dominantly relict sand wedges with an average depth, maximum apparent width, minimum apparent width, and H/W of 78, 39, 3.8, and 2.9 cm, respectively. The host materials are fine-textured (silt loam, silty clay loam, clay loam) till and the infillings are aeolian sand. The soils are primarily Calciargidic Argixerolls that bear a legacy of climate change. Whereas the sand wedges formed during very cold (-4 to -8 °C or colder) and dry (ca. <=100 mm precipitation/yr) glacial periods, petrocalcic horizons from calcium carbonate contributed by dustfall formed during warmer (7 °C or warmer) and moister (>= 250 mm/yr) interglacial periods. The paleo-argillic (Bt) horizons reflect unusually moist interglacial events where the mean annual precipitation ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...