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

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...

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Bibliographic Details
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
Description
Summary: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 ...

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