Bailey, John E.; Self, Stephen; Wooler, Luke K. and Mouginis-Mark, Peter J.
Discrimination of fluvial and eolian features on large ignimbrite sheets around La Pacana Caldera, Chile, using Landsat and SRTM-derived DEM.
Remote Sensing of Environment, 108(1) pp. 24–41.
Satellite images and ground-based observations were used to investigate the morphology and origin of valleys and ridges across large ignimbrite provinces around La Pacana Caldera, N. Chile. We studied 12 separate sites that included five different ignimbrite units that range in age from 5.6 ± 0.5 Ma to 1.35 ± 0.15 Ma. Over 400 features from within these study sites were quantified. Study sites typically have dimensions of 25 × 35 km. Measurements were made using Landsat TM, ETM+, and SRTM-derived DEM and Shaded Relief images. Morphological measurements were made of the ridges and channels, including the direction of regional slope, length, orientation and gradient of each feature. A classification of the different ignimbrite erosion influences, resulting in varying landscape morphologies identified 4 landscape types; Fluvial, Eolian, Modified and Complex. We conclude that the most prevalent features are fluvial-derived channels but the most distinctive are linear, wind-derived ridges. The orientation of these ridges suggests that strong uni-directional winds from the northwest have been constant over a long period of time (> 1 My).
||2006 Elsevier Inc.
|Project Funding Details:
|Funded Project Name||Project ID||Funding Body|
|Not Set||Not Set||NASA Earth System Science Fellowship [grant number NGT5-50319]|
||Ignimbrite; La Pacana; erosion patterns; Landsat TM; SRTM
||Science > Environment, Earth and Ecosystems
||14 Jul 2009 08:58
||15 Jan 2016 11:39
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