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What makes a rolling landscape roll?New study explains evenly spaced ridges and valleys; could help identify signs of life on other planets（图）
rolling landscape ridges and valleys other planets
2009/7/28
The fundamental understanding of the processes that lead to these parallel grooves is not just useful theoretically, but could ultimately allow geologists to predict how eroding landscapes will respon...
Use and Limitations of Second-Derivative Diffuse Reflectance Spectroscopy in the Visible to Near-Infrared Range to Identify and Quantify Fe Oxide Minerals in Soils
Crystal Field Bands Diffuse Reflectance Spectroscopy Goethite Hematite Intervalence Charge Transfer Iron Oxides Magnetite
2011/12/8
Abstract: We measured the visible to near-infrared (IR) spectra of 176 synthetic and natural samples of Fe oxides, oxyhydroxides and an oxyhydroxysulfate (here collectively called “Fe oxides”), and of...