Bockheim, James G; Coronato, A; Rabassa, J; Ercolano, B; Ponce, J (2009): (Table 2) Properties of relict ice and sand wedges from six sites near Rio Gallegos, southern Patagonia [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.786099, Supplement to: Bockheim, JG et al. (2009): Relict sand wedges in southern Patagonia and their stratigraphic and paleo-environmental significance. Quaternary Science Reviews, 28(13-14), 1188-1199, https://doi.org/10.1016/j.quascirev.2008.12.011
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Abstract:
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 may have been 400 mm/yr. Permafrost was nearly continuous in southern Patagonia during the Illinoian glacial stage (ca. 200 ka), the early to mid-Pleistocene (ca. 800-500 ka), and on two occasions during the early Pleistocene (ca. 1.0-1.1 Ma).
Project(s):
Coverage:
Latitude: -52.000000 * Longitude: -70.000000
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Area/locality | Area | Bockheim, James G | |||
| 2 | Surface description | Surf descr | Bockheim, James G | surface into which wedges extend | ||
| 3 | Sediment type | Sediment | Bockheim, James G | wedge material | ||
| 4 | Embedding material | Embedding mat | Bockheim, James G | host material | ||
| 5 | Sample type | Samp type | Bockheim, James G | wedge type | ||
| 6 | Description | Description | Bockheim, James G | wedge shape: W = wedge, F = funnel, V = vein, C = complex | ||
| 7 | Frequency | Frequency | # | Bockheim, James G | number of wedges/100 m | |
| 8 | Height | Height | Bockheim, James G | avg. wedge height [cm] | ||
| 9 | Width | w | m | Bockheim, James G | max. wedge width | |
| 10 | Width | w | m | Bockheim, James G | min. wedge width | |
| 11 | Ratio | Ratio | Bockheim, James G | height (avg.)/width (avg.) | ||
| 12 | Stage | Stage | Bockheim, James G | Carbonate stage: I = discontinous clast coatings; II = continuous clast coatings; II+ = continuous clast coatings and local cementation, whitened appearance; III = 50-90% K fabric; III+ = continuous cementation; IV = continuous cementation and laminated structure | ||
| 13 | Stage | Stage | Bockheim, James G | Carbonate stage: I = discontinous clast coatings; II = continuous clast coatings | ||
| 14 | Soil reaction/conductivity | Soil reaction/conductivity | Bockheim, James G | wedge reaction to 10% HCl; after Soil Survey Staff (1993) | ||
| 15 | Texture | Texture | Bockheim, James G | of wedge; SL = sandy loam, LS = loamy sand | ||
| 16 | Texture | Texture | Bockheim, James G | of host; SL = sandy loam, LS = loamy sand | ||
| 17 | Color description | Color desc | Bockheim, James G | Munsell Color System (1994) | of wedge | |
| 18 | Structure | Structure | Bockheim, James G | of wedge; pr = prismatic; vl = vertically laminated; vs = vertically oriented stones; m = massive; 0sg = structureless, single grain |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
143 data points